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1 | /* | |
2 | * Copyright (c) 2014-2015 Hisilicon Limited. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | */ | |
9 | ||
10 | #include <linux/clk.h> | |
11 | #include <linux/cpumask.h> | |
12 | #include <linux/etherdevice.h> | |
13 | #include <linux/if_vlan.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/io.h> | |
16 | #include <linux/ip.h> | |
17 | #include <linux/ipv6.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/phy.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/skbuff.h> | |
22 | ||
23 | #include "hnae.h" | |
24 | #include "hns_enet.h" | |
25 | #include "hns_dsaf_mac.h" | |
26 | ||
27 | #define NIC_MAX_Q_PER_VF 16 | |
28 | #define HNS_NIC_TX_TIMEOUT (5 * HZ) | |
29 | ||
30 | #define SERVICE_TIMER_HZ (1 * HZ) | |
31 | ||
32 | #define RCB_IRQ_NOT_INITED 0 | |
33 | #define RCB_IRQ_INITED 1 | |
34 | #define HNS_BUFFER_SIZE_2048 2048 | |
35 | ||
36 | #define BD_MAX_SEND_SIZE 8191 | |
37 | #define SKB_TMP_LEN(SKB) \ | |
38 | (((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB)) | |
39 | ||
40 | static void fill_v2_desc_hw(struct hnae_ring *ring, void *priv, int size, | |
41 | int send_sz, dma_addr_t dma, int frag_end, | |
42 | int buf_num, enum hns_desc_type type, int mtu) | |
43 | { | |
44 | struct hnae_desc *desc = &ring->desc[ring->next_to_use]; | |
45 | struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use]; | |
46 | struct iphdr *iphdr; | |
47 | struct ipv6hdr *ipv6hdr; | |
48 | struct sk_buff *skb; | |
49 | __be16 protocol; | |
50 | u8 bn_pid = 0; | |
51 | u8 rrcfv = 0; | |
52 | u8 ip_offset = 0; | |
53 | u8 tvsvsn = 0; | |
54 | u16 mss = 0; | |
55 | u8 l4_len = 0; | |
56 | u16 paylen = 0; | |
57 | ||
58 | desc_cb->priv = priv; | |
59 | desc_cb->length = size; | |
60 | desc_cb->dma = dma; | |
61 | desc_cb->type = type; | |
62 | ||
63 | desc->addr = cpu_to_le64(dma); | |
64 | desc->tx.send_size = cpu_to_le16((u16)send_sz); | |
65 | ||
66 | /* config bd buffer end */ | |
67 | hnae_set_bit(rrcfv, HNSV2_TXD_VLD_B, 1); | |
68 | hnae_set_field(bn_pid, HNSV2_TXD_BUFNUM_M, 0, buf_num - 1); | |
69 | ||
70 | /* fill port_id in the tx bd for sending management pkts */ | |
71 | hnae_set_field(bn_pid, HNSV2_TXD_PORTID_M, | |
72 | HNSV2_TXD_PORTID_S, ring->q->handle->dport_id); | |
73 | ||
74 | if (type == DESC_TYPE_SKB) { | |
75 | skb = (struct sk_buff *)priv; | |
76 | ||
77 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
78 | skb_reset_mac_len(skb); | |
79 | protocol = skb->protocol; | |
80 | ip_offset = ETH_HLEN; | |
81 | ||
82 | if (protocol == htons(ETH_P_8021Q)) { | |
83 | ip_offset += VLAN_HLEN; | |
84 | protocol = vlan_get_protocol(skb); | |
85 | skb->protocol = protocol; | |
86 | } | |
87 | ||
88 | if (skb->protocol == htons(ETH_P_IP)) { | |
89 | iphdr = ip_hdr(skb); | |
90 | hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1); | |
91 | hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1); | |
92 | ||
93 | /* check for tcp/udp header */ | |
94 | if (iphdr->protocol == IPPROTO_TCP && | |
95 | skb_is_gso(skb)) { | |
96 | hnae_set_bit(tvsvsn, | |
97 | HNSV2_TXD_TSE_B, 1); | |
98 | l4_len = tcp_hdrlen(skb); | |
99 | mss = skb_shinfo(skb)->gso_size; | |
100 | paylen = skb->len - SKB_TMP_LEN(skb); | |
101 | } | |
102 | } else if (skb->protocol == htons(ETH_P_IPV6)) { | |
103 | hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1); | |
104 | ipv6hdr = ipv6_hdr(skb); | |
105 | hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1); | |
106 | ||
107 | /* check for tcp/udp header */ | |
108 | if (ipv6hdr->nexthdr == IPPROTO_TCP && | |
109 | skb_is_gso(skb) && skb_is_gso_v6(skb)) { | |
110 | hnae_set_bit(tvsvsn, | |
111 | HNSV2_TXD_TSE_B, 1); | |
112 | l4_len = tcp_hdrlen(skb); | |
113 | mss = skb_shinfo(skb)->gso_size; | |
114 | paylen = skb->len - SKB_TMP_LEN(skb); | |
115 | } | |
116 | } | |
117 | desc->tx.ip_offset = ip_offset; | |
118 | desc->tx.tse_vlan_snap_v6_sctp_nth = tvsvsn; | |
119 | desc->tx.mss = cpu_to_le16(mss); | |
120 | desc->tx.l4_len = l4_len; | |
121 | desc->tx.paylen = cpu_to_le16(paylen); | |
122 | } | |
123 | } | |
124 | ||
125 | hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end); | |
126 | ||
127 | desc->tx.bn_pid = bn_pid; | |
128 | desc->tx.ra_ri_cs_fe_vld = rrcfv; | |
129 | ||
130 | ring_ptr_move_fw(ring, next_to_use); | |
131 | } | |
132 | ||
133 | static void fill_v2_desc(struct hnae_ring *ring, void *priv, | |
134 | int size, dma_addr_t dma, int frag_end, | |
135 | int buf_num, enum hns_desc_type type, int mtu) | |
136 | { | |
137 | fill_v2_desc_hw(ring, priv, size, size, dma, frag_end, | |
138 | buf_num, type, mtu); | |
139 | } | |
140 | ||
141 | static const struct acpi_device_id hns_enet_acpi_match[] = { | |
142 | { "HISI00C1", 0 }, | |
143 | { "HISI00C2", 0 }, | |
144 | { }, | |
145 | }; | |
146 | MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match); | |
147 | ||
148 | static void fill_desc(struct hnae_ring *ring, void *priv, | |
149 | int size, dma_addr_t dma, int frag_end, | |
150 | int buf_num, enum hns_desc_type type, int mtu) | |
151 | { | |
152 | struct hnae_desc *desc = &ring->desc[ring->next_to_use]; | |
153 | struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use]; | |
154 | struct sk_buff *skb; | |
155 | __be16 protocol; | |
156 | u32 ip_offset; | |
157 | u32 asid_bufnum_pid = 0; | |
158 | u32 flag_ipoffset = 0; | |
159 | ||
160 | desc_cb->priv = priv; | |
161 | desc_cb->length = size; | |
162 | desc_cb->dma = dma; | |
163 | desc_cb->type = type; | |
164 | ||
165 | desc->addr = cpu_to_le64(dma); | |
166 | desc->tx.send_size = cpu_to_le16((u16)size); | |
167 | ||
168 | /*config bd buffer end */ | |
169 | flag_ipoffset |= 1 << HNS_TXD_VLD_B; | |
170 | ||
171 | asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S; | |
172 | ||
173 | if (type == DESC_TYPE_SKB) { | |
174 | skb = (struct sk_buff *)priv; | |
175 | ||
176 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
177 | protocol = skb->protocol; | |
178 | ip_offset = ETH_HLEN; | |
179 | ||
180 | /*if it is a SW VLAN check the next protocol*/ | |
181 | if (protocol == htons(ETH_P_8021Q)) { | |
182 | ip_offset += VLAN_HLEN; | |
183 | protocol = vlan_get_protocol(skb); | |
184 | skb->protocol = protocol; | |
185 | } | |
186 | ||
187 | if (skb->protocol == htons(ETH_P_IP)) { | |
188 | flag_ipoffset |= 1 << HNS_TXD_L3CS_B; | |
189 | /* check for tcp/udp header */ | |
190 | flag_ipoffset |= 1 << HNS_TXD_L4CS_B; | |
191 | ||
192 | } else if (skb->protocol == htons(ETH_P_IPV6)) { | |
193 | /* ipv6 has not l3 cs, check for L4 header */ | |
194 | flag_ipoffset |= 1 << HNS_TXD_L4CS_B; | |
195 | } | |
196 | ||
197 | flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S; | |
198 | } | |
199 | } | |
200 | ||
201 | flag_ipoffset |= frag_end << HNS_TXD_FE_B; | |
202 | ||
203 | desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid); | |
204 | desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset); | |
205 | ||
206 | ring_ptr_move_fw(ring, next_to_use); | |
207 | } | |
208 | ||
209 | static void unfill_desc(struct hnae_ring *ring) | |
210 | { | |
211 | ring_ptr_move_bw(ring, next_to_use); | |
212 | } | |
213 | ||
214 | static int hns_nic_maybe_stop_tx( | |
215 | struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring) | |
216 | { | |
217 | struct sk_buff *skb = *out_skb; | |
218 | struct sk_buff *new_skb = NULL; | |
219 | int buf_num; | |
220 | ||
221 | /* no. of segments (plus a header) */ | |
222 | buf_num = skb_shinfo(skb)->nr_frags + 1; | |
223 | ||
224 | if (unlikely(buf_num > ring->max_desc_num_per_pkt)) { | |
225 | if (ring_space(ring) < 1) | |
226 | return -EBUSY; | |
227 | ||
228 | new_skb = skb_copy(skb, GFP_ATOMIC); | |
229 | if (!new_skb) | |
230 | return -ENOMEM; | |
231 | ||
232 | dev_kfree_skb_any(skb); | |
233 | *out_skb = new_skb; | |
234 | buf_num = 1; | |
235 | } else if (buf_num > ring_space(ring)) { | |
236 | return -EBUSY; | |
237 | } | |
238 | ||
239 | *bnum = buf_num; | |
240 | return 0; | |
241 | } | |
242 | ||
243 | static int hns_nic_maybe_stop_tso( | |
244 | struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring) | |
245 | { | |
246 | int i; | |
247 | int size; | |
248 | int buf_num; | |
249 | int frag_num; | |
250 | struct sk_buff *skb = *out_skb; | |
251 | struct sk_buff *new_skb = NULL; | |
252 | struct skb_frag_struct *frag; | |
253 | ||
254 | size = skb_headlen(skb); | |
255 | buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE; | |
256 | ||
257 | frag_num = skb_shinfo(skb)->nr_frags; | |
258 | for (i = 0; i < frag_num; i++) { | |
259 | frag = &skb_shinfo(skb)->frags[i]; | |
260 | size = skb_frag_size(frag); | |
261 | buf_num += (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE; | |
262 | } | |
263 | ||
264 | if (unlikely(buf_num > ring->max_desc_num_per_pkt)) { | |
265 | buf_num = (skb->len + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE; | |
266 | if (ring_space(ring) < buf_num) | |
267 | return -EBUSY; | |
268 | /* manual split the send packet */ | |
269 | new_skb = skb_copy(skb, GFP_ATOMIC); | |
270 | if (!new_skb) | |
271 | return -ENOMEM; | |
272 | dev_kfree_skb_any(skb); | |
273 | *out_skb = new_skb; | |
274 | ||
275 | } else if (ring_space(ring) < buf_num) { | |
276 | return -EBUSY; | |
277 | } | |
278 | ||
279 | *bnum = buf_num; | |
280 | return 0; | |
281 | } | |
282 | ||
283 | static void fill_tso_desc(struct hnae_ring *ring, void *priv, | |
284 | int size, dma_addr_t dma, int frag_end, | |
285 | int buf_num, enum hns_desc_type type, int mtu) | |
286 | { | |
287 | int frag_buf_num; | |
288 | int sizeoflast; | |
289 | int k; | |
290 | ||
291 | frag_buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE; | |
292 | sizeoflast = size % BD_MAX_SEND_SIZE; | |
293 | sizeoflast = sizeoflast ? sizeoflast : BD_MAX_SEND_SIZE; | |
294 | ||
295 | /* when the frag size is bigger than hardware, split this frag */ | |
296 | for (k = 0; k < frag_buf_num; k++) | |
297 | fill_v2_desc_hw(ring, priv, k == 0 ? size : 0, | |
298 | (k == frag_buf_num - 1) ? | |
299 | sizeoflast : BD_MAX_SEND_SIZE, | |
300 | dma + BD_MAX_SEND_SIZE * k, | |
301 | frag_end && (k == frag_buf_num - 1) ? 1 : 0, | |
302 | buf_num, | |
303 | (type == DESC_TYPE_SKB && !k) ? | |
304 | DESC_TYPE_SKB : DESC_TYPE_PAGE, | |
305 | mtu); | |
306 | } | |
307 | ||
308 | netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev, | |
309 | struct sk_buff *skb, | |
310 | struct hns_nic_ring_data *ring_data) | |
311 | { | |
312 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
313 | struct hnae_ring *ring = ring_data->ring; | |
314 | struct device *dev = ring_to_dev(ring); | |
315 | struct netdev_queue *dev_queue; | |
316 | struct skb_frag_struct *frag; | |
317 | int buf_num; | |
318 | int seg_num; | |
319 | dma_addr_t dma; | |
320 | int size, next_to_use; | |
321 | int i; | |
322 | ||
323 | switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) { | |
324 | case -EBUSY: | |
325 | ring->stats.tx_busy++; | |
326 | goto out_net_tx_busy; | |
327 | case -ENOMEM: | |
328 | ring->stats.sw_err_cnt++; | |
329 | netdev_err(ndev, "no memory to xmit!\n"); | |
330 | goto out_err_tx_ok; | |
331 | default: | |
332 | break; | |
333 | } | |
334 | ||
335 | /* no. of segments (plus a header) */ | |
336 | seg_num = skb_shinfo(skb)->nr_frags + 1; | |
337 | next_to_use = ring->next_to_use; | |
338 | ||
339 | /* fill the first part */ | |
340 | size = skb_headlen(skb); | |
341 | dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE); | |
342 | if (dma_mapping_error(dev, dma)) { | |
343 | netdev_err(ndev, "TX head DMA map failed\n"); | |
344 | ring->stats.sw_err_cnt++; | |
345 | goto out_err_tx_ok; | |
346 | } | |
347 | priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0, | |
348 | buf_num, DESC_TYPE_SKB, ndev->mtu); | |
349 | ||
350 | /* fill the fragments */ | |
351 | for (i = 1; i < seg_num; i++) { | |
352 | frag = &skb_shinfo(skb)->frags[i - 1]; | |
353 | size = skb_frag_size(frag); | |
354 | dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE); | |
355 | if (dma_mapping_error(dev, dma)) { | |
356 | netdev_err(ndev, "TX frag(%d) DMA map failed\n", i); | |
357 | ring->stats.sw_err_cnt++; | |
358 | goto out_map_frag_fail; | |
359 | } | |
360 | priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma, | |
361 | seg_num - 1 == i ? 1 : 0, buf_num, | |
362 | DESC_TYPE_PAGE, ndev->mtu); | |
363 | } | |
364 | ||
365 | /*complete translate all packets*/ | |
366 | dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping); | |
367 | netdev_tx_sent_queue(dev_queue, skb->len); | |
368 | ||
369 | netif_trans_update(ndev); | |
370 | ndev->stats.tx_bytes += skb->len; | |
371 | ndev->stats.tx_packets++; | |
372 | ||
373 | wmb(); /* commit all data before submit */ | |
374 | assert(skb->queue_mapping < priv->ae_handle->q_num); | |
375 | hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num); | |
376 | ||
377 | return NETDEV_TX_OK; | |
378 | ||
379 | out_map_frag_fail: | |
380 | ||
381 | while (ring->next_to_use != next_to_use) { | |
382 | unfill_desc(ring); | |
383 | if (ring->next_to_use != next_to_use) | |
384 | dma_unmap_page(dev, | |
385 | ring->desc_cb[ring->next_to_use].dma, | |
386 | ring->desc_cb[ring->next_to_use].length, | |
387 | DMA_TO_DEVICE); | |
388 | else | |
389 | dma_unmap_single(dev, | |
390 | ring->desc_cb[next_to_use].dma, | |
391 | ring->desc_cb[next_to_use].length, | |
392 | DMA_TO_DEVICE); | |
393 | } | |
394 | ||
395 | out_err_tx_ok: | |
396 | ||
397 | dev_kfree_skb_any(skb); | |
398 | return NETDEV_TX_OK; | |
399 | ||
400 | out_net_tx_busy: | |
401 | ||
402 | netif_stop_subqueue(ndev, skb->queue_mapping); | |
403 | ||
404 | /* Herbert's original patch had: | |
405 | * smp_mb__after_netif_stop_queue(); | |
406 | * but since that doesn't exist yet, just open code it. | |
407 | */ | |
408 | smp_mb(); | |
409 | return NETDEV_TX_BUSY; | |
410 | } | |
411 | ||
412 | static void hns_nic_reuse_page(struct sk_buff *skb, int i, | |
413 | struct hnae_ring *ring, int pull_len, | |
414 | struct hnae_desc_cb *desc_cb) | |
415 | { | |
416 | struct hnae_desc *desc; | |
417 | u32 truesize; | |
418 | int size; | |
419 | int last_offset; | |
420 | bool twobufs; | |
421 | ||
422 | twobufs = ((PAGE_SIZE < 8192) && | |
423 | hnae_buf_size(ring) == HNS_BUFFER_SIZE_2048); | |
424 | ||
425 | desc = &ring->desc[ring->next_to_clean]; | |
426 | size = le16_to_cpu(desc->rx.size); | |
427 | ||
428 | if (twobufs) { | |
429 | truesize = hnae_buf_size(ring); | |
430 | } else { | |
431 | truesize = ALIGN(size, L1_CACHE_BYTES); | |
432 | last_offset = hnae_page_size(ring) - hnae_buf_size(ring); | |
433 | } | |
434 | ||
435 | skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len, | |
436 | size - pull_len, truesize); | |
437 | ||
438 | /* avoid re-using remote pages,flag default unreuse */ | |
439 | if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id())) | |
440 | return; | |
441 | ||
442 | if (twobufs) { | |
443 | /* if we are only owner of page we can reuse it */ | |
444 | if (likely(page_count(desc_cb->priv) == 1)) { | |
445 | /* flip page offset to other buffer */ | |
446 | desc_cb->page_offset ^= truesize; | |
447 | ||
448 | desc_cb->reuse_flag = 1; | |
449 | /* bump ref count on page before it is given*/ | |
450 | get_page(desc_cb->priv); | |
451 | } | |
452 | return; | |
453 | } | |
454 | ||
455 | /* move offset up to the next cache line */ | |
456 | desc_cb->page_offset += truesize; | |
457 | ||
458 | if (desc_cb->page_offset <= last_offset) { | |
459 | desc_cb->reuse_flag = 1; | |
460 | /* bump ref count on page before it is given*/ | |
461 | get_page(desc_cb->priv); | |
462 | } | |
463 | } | |
464 | ||
465 | static void get_v2rx_desc_bnum(u32 bnum_flag, int *out_bnum) | |
466 | { | |
467 | *out_bnum = hnae_get_field(bnum_flag, | |
468 | HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S) + 1; | |
469 | } | |
470 | ||
471 | static void get_rx_desc_bnum(u32 bnum_flag, int *out_bnum) | |
472 | { | |
473 | *out_bnum = hnae_get_field(bnum_flag, | |
474 | HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S); | |
475 | } | |
476 | ||
477 | static void hns_nic_rx_checksum(struct hns_nic_ring_data *ring_data, | |
478 | struct sk_buff *skb, u32 flag) | |
479 | { | |
480 | struct net_device *netdev = ring_data->napi.dev; | |
481 | u32 l3id; | |
482 | u32 l4id; | |
483 | ||
484 | /* check if RX checksum offload is enabled */ | |
485 | if (unlikely(!(netdev->features & NETIF_F_RXCSUM))) | |
486 | return; | |
487 | ||
488 | /* In hardware, we only support checksum for the following protocols: | |
489 | * 1) IPv4, | |
490 | * 2) TCP(over IPv4 or IPv6), | |
491 | * 3) UDP(over IPv4 or IPv6), | |
492 | * 4) SCTP(over IPv4 or IPv6) | |
493 | * but we support many L3(IPv4, IPv6, MPLS, PPPoE etc) and L4(TCP, | |
494 | * UDP, GRE, SCTP, IGMP, ICMP etc.) protocols. | |
495 | * | |
496 | * Hardware limitation: | |
497 | * Our present hardware RX Descriptor lacks L3/L4 checksum "Status & | |
498 | * Error" bit (which usually can be used to indicate whether checksum | |
499 | * was calculated by the hardware and if there was any error encountered | |
500 | * during checksum calculation). | |
501 | * | |
502 | * Software workaround: | |
503 | * We do get info within the RX descriptor about the kind of L3/L4 | |
504 | * protocol coming in the packet and the error status. These errors | |
505 | * might not just be checksum errors but could be related to version, | |
506 | * length of IPv4, UDP, TCP etc. | |
507 | * Because there is no-way of knowing if it is a L3/L4 error due to bad | |
508 | * checksum or any other L3/L4 error, we will not (cannot) convey | |
509 | * checksum status for such cases to upper stack and will not maintain | |
510 | * the RX L3/L4 checksum counters as well. | |
511 | */ | |
512 | ||
513 | l3id = hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S); | |
514 | l4id = hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S); | |
515 | ||
516 | /* check L3 protocol for which checksum is supported */ | |
517 | if ((l3id != HNS_RX_FLAG_L3ID_IPV4) && (l3id != HNS_RX_FLAG_L3ID_IPV6)) | |
518 | return; | |
519 | ||
520 | /* check for any(not just checksum)flagged L3 protocol errors */ | |
521 | if (unlikely(hnae_get_bit(flag, HNS_RXD_L3E_B))) | |
522 | return; | |
523 | ||
524 | /* we do not support checksum of fragmented packets */ | |
525 | if (unlikely(hnae_get_bit(flag, HNS_RXD_FRAG_B))) | |
526 | return; | |
527 | ||
528 | /* check L4 protocol for which checksum is supported */ | |
529 | if ((l4id != HNS_RX_FLAG_L4ID_TCP) && | |
530 | (l4id != HNS_RX_FLAG_L4ID_UDP) && | |
531 | (l4id != HNS_RX_FLAG_L4ID_SCTP)) | |
532 | return; | |
533 | ||
534 | /* check for any(not just checksum)flagged L4 protocol errors */ | |
535 | if (unlikely(hnae_get_bit(flag, HNS_RXD_L4E_B))) | |
536 | return; | |
537 | ||
538 | /* now, this has to be a packet with valid RX checksum */ | |
539 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
540 | } | |
541 | ||
542 | static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data, | |
543 | struct sk_buff **out_skb, int *out_bnum) | |
544 | { | |
545 | struct hnae_ring *ring = ring_data->ring; | |
546 | struct net_device *ndev = ring_data->napi.dev; | |
547 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
548 | struct sk_buff *skb; | |
549 | struct hnae_desc *desc; | |
550 | struct hnae_desc_cb *desc_cb; | |
551 | unsigned char *va; | |
552 | int bnum, length, i; | |
553 | int pull_len; | |
554 | u32 bnum_flag; | |
555 | ||
556 | desc = &ring->desc[ring->next_to_clean]; | |
557 | desc_cb = &ring->desc_cb[ring->next_to_clean]; | |
558 | ||
559 | prefetch(desc); | |
560 | ||
561 | va = (unsigned char *)desc_cb->buf + desc_cb->page_offset; | |
562 | ||
563 | /* prefetch first cache line of first page */ | |
564 | prefetch(va); | |
565 | #if L1_CACHE_BYTES < 128 | |
566 | prefetch(va + L1_CACHE_BYTES); | |
567 | #endif | |
568 | ||
569 | skb = *out_skb = napi_alloc_skb(&ring_data->napi, | |
570 | HNS_RX_HEAD_SIZE); | |
571 | if (unlikely(!skb)) { | |
572 | netdev_err(ndev, "alloc rx skb fail\n"); | |
573 | ring->stats.sw_err_cnt++; | |
574 | return -ENOMEM; | |
575 | } | |
576 | ||
577 | prefetchw(skb->data); | |
578 | length = le16_to_cpu(desc->rx.pkt_len); | |
579 | bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag); | |
580 | priv->ops.get_rxd_bnum(bnum_flag, &bnum); | |
581 | *out_bnum = bnum; | |
582 | ||
583 | if (length <= HNS_RX_HEAD_SIZE) { | |
584 | memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long))); | |
585 | ||
586 | /* we can reuse buffer as-is, just make sure it is local */ | |
587 | if (likely(page_to_nid(desc_cb->priv) == numa_node_id())) | |
588 | desc_cb->reuse_flag = 1; | |
589 | else /* this page cannot be reused so discard it */ | |
590 | put_page(desc_cb->priv); | |
591 | ||
592 | ring_ptr_move_fw(ring, next_to_clean); | |
593 | ||
594 | if (unlikely(bnum != 1)) { /* check err*/ | |
595 | *out_bnum = 1; | |
596 | goto out_bnum_err; | |
597 | } | |
598 | } else { | |
599 | ring->stats.seg_pkt_cnt++; | |
600 | ||
601 | pull_len = eth_get_headlen(va, HNS_RX_HEAD_SIZE); | |
602 | memcpy(__skb_put(skb, pull_len), va, | |
603 | ALIGN(pull_len, sizeof(long))); | |
604 | ||
605 | hns_nic_reuse_page(skb, 0, ring, pull_len, desc_cb); | |
606 | ring_ptr_move_fw(ring, next_to_clean); | |
607 | ||
608 | if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/ | |
609 | *out_bnum = 1; | |
610 | goto out_bnum_err; | |
611 | } | |
612 | for (i = 1; i < bnum; i++) { | |
613 | desc = &ring->desc[ring->next_to_clean]; | |
614 | desc_cb = &ring->desc_cb[ring->next_to_clean]; | |
615 | ||
616 | hns_nic_reuse_page(skb, i, ring, 0, desc_cb); | |
617 | ring_ptr_move_fw(ring, next_to_clean); | |
618 | } | |
619 | } | |
620 | ||
621 | /* check except process, free skb and jump the desc */ | |
622 | if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) { | |
623 | out_bnum_err: | |
624 | *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/ | |
625 | netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n", | |
626 | bnum, ring->max_desc_num_per_pkt, | |
627 | length, (int)MAX_SKB_FRAGS, | |
628 | ((u64 *)desc)[0], ((u64 *)desc)[1]); | |
629 | ring->stats.err_bd_num++; | |
630 | dev_kfree_skb_any(skb); | |
631 | return -EDOM; | |
632 | } | |
633 | ||
634 | bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag); | |
635 | ||
636 | if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) { | |
637 | netdev_err(ndev, "no valid bd,%016llx,%016llx\n", | |
638 | ((u64 *)desc)[0], ((u64 *)desc)[1]); | |
639 | ring->stats.non_vld_descs++; | |
640 | dev_kfree_skb_any(skb); | |
641 | return -EINVAL; | |
642 | } | |
643 | ||
644 | if (unlikely((!desc->rx.pkt_len) || | |
645 | hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) { | |
646 | ring->stats.err_pkt_len++; | |
647 | dev_kfree_skb_any(skb); | |
648 | return -EFAULT; | |
649 | } | |
650 | ||
651 | if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) { | |
652 | ring->stats.l2_err++; | |
653 | dev_kfree_skb_any(skb); | |
654 | return -EFAULT; | |
655 | } | |
656 | ||
657 | ring->stats.rx_pkts++; | |
658 | ring->stats.rx_bytes += skb->len; | |
659 | ||
660 | /* indicate to upper stack if our hardware has already calculated | |
661 | * the RX checksum | |
662 | */ | |
663 | hns_nic_rx_checksum(ring_data, skb, bnum_flag); | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | static void | |
669 | hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count) | |
670 | { | |
671 | int i, ret; | |
672 | struct hnae_desc_cb res_cbs; | |
673 | struct hnae_desc_cb *desc_cb; | |
674 | struct hnae_ring *ring = ring_data->ring; | |
675 | struct net_device *ndev = ring_data->napi.dev; | |
676 | ||
677 | for (i = 0; i < cleand_count; i++) { | |
678 | desc_cb = &ring->desc_cb[ring->next_to_use]; | |
679 | if (desc_cb->reuse_flag) { | |
680 | ring->stats.reuse_pg_cnt++; | |
681 | hnae_reuse_buffer(ring, ring->next_to_use); | |
682 | } else { | |
683 | ret = hnae_reserve_buffer_map(ring, &res_cbs); | |
684 | if (ret) { | |
685 | ring->stats.sw_err_cnt++; | |
686 | netdev_err(ndev, "hnae reserve buffer map failed.\n"); | |
687 | break; | |
688 | } | |
689 | hnae_replace_buffer(ring, ring->next_to_use, &res_cbs); | |
690 | } | |
691 | ||
692 | ring_ptr_move_fw(ring, next_to_use); | |
693 | } | |
694 | ||
695 | wmb(); /* make all data has been write before submit */ | |
696 | writel_relaxed(i, ring->io_base + RCB_REG_HEAD); | |
697 | } | |
698 | ||
699 | /* return error number for error or number of desc left to take | |
700 | */ | |
701 | static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data, | |
702 | struct sk_buff *skb) | |
703 | { | |
704 | struct net_device *ndev = ring_data->napi.dev; | |
705 | ||
706 | skb->protocol = eth_type_trans(skb, ndev); | |
707 | (void)napi_gro_receive(&ring_data->napi, skb); | |
708 | } | |
709 | ||
710 | static int hns_desc_unused(struct hnae_ring *ring) | |
711 | { | |
712 | int ntc = ring->next_to_clean; | |
713 | int ntu = ring->next_to_use; | |
714 | ||
715 | return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu; | |
716 | } | |
717 | ||
718 | #define HNS_LOWEST_LATENCY_RATE 27 /* 27 MB/s */ | |
719 | #define HNS_LOW_LATENCY_RATE 80 /* 80 MB/s */ | |
720 | ||
721 | #define HNS_COAL_BDNUM 3 | |
722 | ||
723 | static u32 hns_coal_rx_bdnum(struct hnae_ring *ring) | |
724 | { | |
725 | bool coal_enable = ring->q->handle->coal_adapt_en; | |
726 | ||
727 | if (coal_enable && | |
728 | ring->coal_last_rx_bytes > HNS_LOWEST_LATENCY_RATE) | |
729 | return HNS_COAL_BDNUM; | |
730 | else | |
731 | return 0; | |
732 | } | |
733 | ||
734 | static void hns_update_rx_rate(struct hnae_ring *ring) | |
735 | { | |
736 | bool coal_enable = ring->q->handle->coal_adapt_en; | |
737 | u32 time_passed_ms; | |
738 | u64 total_bytes; | |
739 | ||
740 | if (!coal_enable || | |
741 | time_before(jiffies, ring->coal_last_jiffies + (HZ >> 4))) | |
742 | return; | |
743 | ||
744 | /* ring->stats.rx_bytes overflowed */ | |
745 | if (ring->coal_last_rx_bytes > ring->stats.rx_bytes) { | |
746 | ring->coal_last_rx_bytes = ring->stats.rx_bytes; | |
747 | ring->coal_last_jiffies = jiffies; | |
748 | return; | |
749 | } | |
750 | ||
751 | total_bytes = ring->stats.rx_bytes - ring->coal_last_rx_bytes; | |
752 | time_passed_ms = jiffies_to_msecs(jiffies - ring->coal_last_jiffies); | |
753 | do_div(total_bytes, time_passed_ms); | |
754 | ring->coal_rx_rate = total_bytes >> 10; | |
755 | ||
756 | ring->coal_last_rx_bytes = ring->stats.rx_bytes; | |
757 | ring->coal_last_jiffies = jiffies; | |
758 | } | |
759 | ||
760 | /** | |
761 | * smooth_alg - smoothing algrithm for adjusting coalesce parameter | |
762 | **/ | |
763 | static u32 smooth_alg(u32 new_param, u32 old_param) | |
764 | { | |
765 | u32 gap = (new_param > old_param) ? new_param - old_param | |
766 | : old_param - new_param; | |
767 | ||
768 | if (gap > 8) | |
769 | gap >>= 3; | |
770 | ||
771 | if (new_param > old_param) | |
772 | return old_param + gap; | |
773 | else | |
774 | return old_param - gap; | |
775 | } | |
776 | ||
777 | /** | |
778 | * hns_nic_adp_coalesce - self adapte coalesce according to rx rate | |
779 | * @ring_data: pointer to hns_nic_ring_data | |
780 | **/ | |
781 | static void hns_nic_adpt_coalesce(struct hns_nic_ring_data *ring_data) | |
782 | { | |
783 | struct hnae_ring *ring = ring_data->ring; | |
784 | struct hnae_handle *handle = ring->q->handle; | |
785 | u32 new_coal_param, old_coal_param = ring->coal_param; | |
786 | ||
787 | if (ring->coal_rx_rate < HNS_LOWEST_LATENCY_RATE) | |
788 | new_coal_param = HNAE_LOWEST_LATENCY_COAL_PARAM; | |
789 | else if (ring->coal_rx_rate < HNS_LOW_LATENCY_RATE) | |
790 | new_coal_param = HNAE_LOW_LATENCY_COAL_PARAM; | |
791 | else | |
792 | new_coal_param = HNAE_BULK_LATENCY_COAL_PARAM; | |
793 | ||
794 | if (new_coal_param == old_coal_param && | |
795 | new_coal_param == handle->coal_param) | |
796 | return; | |
797 | ||
798 | new_coal_param = smooth_alg(new_coal_param, old_coal_param); | |
799 | ring->coal_param = new_coal_param; | |
800 | ||
801 | /** | |
802 | * Because all ring in one port has one coalesce param, when one ring | |
803 | * calculate its own coalesce param, it cannot write to hardware at | |
804 | * once. There are three conditions as follows: | |
805 | * 1. current ring's coalesce param is larger than the hardware. | |
806 | * 2. or ring which adapt last time can change again. | |
807 | * 3. timeout. | |
808 | */ | |
809 | if (new_coal_param == handle->coal_param) { | |
810 | handle->coal_last_jiffies = jiffies; | |
811 | handle->coal_ring_idx = ring_data->queue_index; | |
812 | } else if (new_coal_param > handle->coal_param || | |
813 | handle->coal_ring_idx == ring_data->queue_index || | |
814 | time_after(jiffies, handle->coal_last_jiffies + (HZ >> 4))) { | |
815 | handle->dev->ops->set_coalesce_usecs(handle, | |
816 | new_coal_param); | |
817 | handle->dev->ops->set_coalesce_frames(handle, | |
818 | 1, new_coal_param); | |
819 | handle->coal_param = new_coal_param; | |
820 | handle->coal_ring_idx = ring_data->queue_index; | |
821 | handle->coal_last_jiffies = jiffies; | |
822 | } | |
823 | } | |
824 | ||
825 | static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data, | |
826 | int budget, void *v) | |
827 | { | |
828 | struct hnae_ring *ring = ring_data->ring; | |
829 | struct sk_buff *skb; | |
830 | int num, bnum; | |
831 | #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16 | |
832 | int recv_pkts, recv_bds, clean_count, err; | |
833 | int unused_count = hns_desc_unused(ring); | |
834 | ||
835 | num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM); | |
836 | rmb(); /* make sure num taken effect before the other data is touched */ | |
837 | ||
838 | recv_pkts = 0, recv_bds = 0, clean_count = 0; | |
839 | num -= unused_count; | |
840 | ||
841 | while (recv_pkts < budget && recv_bds < num) { | |
842 | /* reuse or realloc buffers */ | |
843 | if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) { | |
844 | hns_nic_alloc_rx_buffers(ring_data, | |
845 | clean_count + unused_count); | |
846 | clean_count = 0; | |
847 | unused_count = hns_desc_unused(ring); | |
848 | } | |
849 | ||
850 | /* poll one pkt */ | |
851 | err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum); | |
852 | if (unlikely(!skb)) /* this fault cannot be repaired */ | |
853 | goto out; | |
854 | ||
855 | recv_bds += bnum; | |
856 | clean_count += bnum; | |
857 | if (unlikely(err)) { /* do jump the err */ | |
858 | recv_pkts++; | |
859 | continue; | |
860 | } | |
861 | ||
862 | /* do update ip stack process*/ | |
863 | ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)( | |
864 | ring_data, skb); | |
865 | recv_pkts++; | |
866 | } | |
867 | ||
868 | out: | |
869 | /* make all data has been write before submit */ | |
870 | if (clean_count + unused_count > 0) | |
871 | hns_nic_alloc_rx_buffers(ring_data, | |
872 | clean_count + unused_count); | |
873 | ||
874 | return recv_pkts; | |
875 | } | |
876 | ||
877 | static bool hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data) | |
878 | { | |
879 | struct hnae_ring *ring = ring_data->ring; | |
880 | int num = 0; | |
881 | bool rx_stopped; | |
882 | ||
883 | hns_update_rx_rate(ring); | |
884 | ||
885 | /* for hardware bug fixed */ | |
886 | ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0); | |
887 | num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM); | |
888 | ||
889 | if (num <= hns_coal_rx_bdnum(ring)) { | |
890 | if (ring->q->handle->coal_adapt_en) | |
891 | hns_nic_adpt_coalesce(ring_data); | |
892 | ||
893 | rx_stopped = true; | |
894 | } else { | |
895 | ring_data->ring->q->handle->dev->ops->toggle_ring_irq( | |
896 | ring_data->ring, 1); | |
897 | ||
898 | rx_stopped = false; | |
899 | } | |
900 | ||
901 | return rx_stopped; | |
902 | } | |
903 | ||
904 | static bool hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data) | |
905 | { | |
906 | struct hnae_ring *ring = ring_data->ring; | |
907 | int num; | |
908 | ||
909 | hns_update_rx_rate(ring); | |
910 | num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM); | |
911 | ||
912 | if (num <= hns_coal_rx_bdnum(ring)) { | |
913 | if (ring->q->handle->coal_adapt_en) | |
914 | hns_nic_adpt_coalesce(ring_data); | |
915 | ||
916 | return true; | |
917 | } | |
918 | ||
919 | return false; | |
920 | } | |
921 | ||
922 | static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring, | |
923 | int *bytes, int *pkts) | |
924 | { | |
925 | struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean]; | |
926 | ||
927 | (*pkts) += (desc_cb->type == DESC_TYPE_SKB); | |
928 | (*bytes) += desc_cb->length; | |
929 | /* desc_cb will be cleaned, after hnae_free_buffer_detach*/ | |
930 | hnae_free_buffer_detach(ring, ring->next_to_clean); | |
931 | ||
932 | ring_ptr_move_fw(ring, next_to_clean); | |
933 | } | |
934 | ||
935 | static int is_valid_clean_head(struct hnae_ring *ring, int h) | |
936 | { | |
937 | int u = ring->next_to_use; | |
938 | int c = ring->next_to_clean; | |
939 | ||
940 | if (unlikely(h > ring->desc_num)) | |
941 | return 0; | |
942 | ||
943 | assert(u > 0 && u < ring->desc_num); | |
944 | assert(c > 0 && c < ring->desc_num); | |
945 | assert(u != c && h != c); /* must be checked before call this func */ | |
946 | ||
947 | return u > c ? (h > c && h <= u) : (h > c || h <= u); | |
948 | } | |
949 | ||
950 | /* netif_tx_lock will turn down the performance, set only when necessary */ | |
951 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
952 | #define NETIF_TX_LOCK(ring) spin_lock(&(ring)->lock) | |
953 | #define NETIF_TX_UNLOCK(ring) spin_unlock(&(ring)->lock) | |
954 | #else | |
955 | #define NETIF_TX_LOCK(ring) | |
956 | #define NETIF_TX_UNLOCK(ring) | |
957 | #endif | |
958 | ||
959 | /* reclaim all desc in one budget | |
960 | * return error or number of desc left | |
961 | */ | |
962 | static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data, | |
963 | int budget, void *v) | |
964 | { | |
965 | struct hnae_ring *ring = ring_data->ring; | |
966 | struct net_device *ndev = ring_data->napi.dev; | |
967 | struct netdev_queue *dev_queue; | |
968 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
969 | int head; | |
970 | int bytes, pkts; | |
971 | ||
972 | NETIF_TX_LOCK(ring); | |
973 | ||
974 | head = readl_relaxed(ring->io_base + RCB_REG_HEAD); | |
975 | rmb(); /* make sure head is ready before touch any data */ | |
976 | ||
977 | if (is_ring_empty(ring) || head == ring->next_to_clean) { | |
978 | NETIF_TX_UNLOCK(ring); | |
979 | return 0; /* no data to poll */ | |
980 | } | |
981 | ||
982 | if (!is_valid_clean_head(ring, head)) { | |
983 | netdev_err(ndev, "wrong head (%d, %d-%d)\n", head, | |
984 | ring->next_to_use, ring->next_to_clean); | |
985 | ring->stats.io_err_cnt++; | |
986 | NETIF_TX_UNLOCK(ring); | |
987 | return -EIO; | |
988 | } | |
989 | ||
990 | bytes = 0; | |
991 | pkts = 0; | |
992 | while (head != ring->next_to_clean) { | |
993 | hns_nic_reclaim_one_desc(ring, &bytes, &pkts); | |
994 | /* issue prefetch for next Tx descriptor */ | |
995 | prefetch(&ring->desc_cb[ring->next_to_clean]); | |
996 | } | |
997 | /* update tx ring statistics. */ | |
998 | ring->stats.tx_pkts += pkts; | |
999 | ring->stats.tx_bytes += bytes; | |
1000 | ||
1001 | NETIF_TX_UNLOCK(ring); | |
1002 | ||
1003 | dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index); | |
1004 | netdev_tx_completed_queue(dev_queue, pkts, bytes); | |
1005 | ||
1006 | if (unlikely(priv->link && !netif_carrier_ok(ndev))) | |
1007 | netif_carrier_on(ndev); | |
1008 | ||
1009 | if (unlikely(pkts && netif_carrier_ok(ndev) && | |
1010 | (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) { | |
1011 | /* Make sure that anybody stopping the queue after this | |
1012 | * sees the new next_to_clean. | |
1013 | */ | |
1014 | smp_mb(); | |
1015 | if (netif_tx_queue_stopped(dev_queue) && | |
1016 | !test_bit(NIC_STATE_DOWN, &priv->state)) { | |
1017 | netif_tx_wake_queue(dev_queue); | |
1018 | ring->stats.restart_queue++; | |
1019 | } | |
1020 | } | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | static bool hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data) | |
1025 | { | |
1026 | struct hnae_ring *ring = ring_data->ring; | |
1027 | int head; | |
1028 | ||
1029 | ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0); | |
1030 | ||
1031 | head = readl_relaxed(ring->io_base + RCB_REG_HEAD); | |
1032 | ||
1033 | if (head != ring->next_to_clean) { | |
1034 | ring_data->ring->q->handle->dev->ops->toggle_ring_irq( | |
1035 | ring_data->ring, 1); | |
1036 | ||
1037 | return false; | |
1038 | } else { | |
1039 | return true; | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | static bool hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data) | |
1044 | { | |
1045 | struct hnae_ring *ring = ring_data->ring; | |
1046 | int head = readl_relaxed(ring->io_base + RCB_REG_HEAD); | |
1047 | ||
1048 | if (head == ring->next_to_clean) | |
1049 | return true; | |
1050 | else | |
1051 | return false; | |
1052 | } | |
1053 | ||
1054 | static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data) | |
1055 | { | |
1056 | struct hnae_ring *ring = ring_data->ring; | |
1057 | struct net_device *ndev = ring_data->napi.dev; | |
1058 | struct netdev_queue *dev_queue; | |
1059 | int head; | |
1060 | int bytes, pkts; | |
1061 | ||
1062 | NETIF_TX_LOCK(ring); | |
1063 | ||
1064 | head = ring->next_to_use; /* ntu :soft setted ring position*/ | |
1065 | bytes = 0; | |
1066 | pkts = 0; | |
1067 | while (head != ring->next_to_clean) | |
1068 | hns_nic_reclaim_one_desc(ring, &bytes, &pkts); | |
1069 | ||
1070 | NETIF_TX_UNLOCK(ring); | |
1071 | ||
1072 | dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index); | |
1073 | netdev_tx_reset_queue(dev_queue); | |
1074 | } | |
1075 | ||
1076 | static int hns_nic_common_poll(struct napi_struct *napi, int budget) | |
1077 | { | |
1078 | int clean_complete = 0; | |
1079 | struct hns_nic_ring_data *ring_data = | |
1080 | container_of(napi, struct hns_nic_ring_data, napi); | |
1081 | struct hnae_ring *ring = ring_data->ring; | |
1082 | ||
1083 | try_again: | |
1084 | clean_complete += ring_data->poll_one( | |
1085 | ring_data, budget - clean_complete, | |
1086 | ring_data->ex_process); | |
1087 | ||
1088 | if (clean_complete < budget) { | |
1089 | if (ring_data->fini_process(ring_data)) { | |
1090 | napi_complete(napi); | |
1091 | ring->q->handle->dev->ops->toggle_ring_irq(ring, 0); | |
1092 | } else { | |
1093 | goto try_again; | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | return clean_complete; | |
1098 | } | |
1099 | ||
1100 | static irqreturn_t hns_irq_handle(int irq, void *dev) | |
1101 | { | |
1102 | struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev; | |
1103 | ||
1104 | ring_data->ring->q->handle->dev->ops->toggle_ring_irq( | |
1105 | ring_data->ring, 1); | |
1106 | napi_schedule(&ring_data->napi); | |
1107 | ||
1108 | return IRQ_HANDLED; | |
1109 | } | |
1110 | ||
1111 | /** | |
1112 | *hns_nic_adjust_link - adjust net work mode by the phy stat or new param | |
1113 | *@ndev: net device | |
1114 | */ | |
1115 | static void hns_nic_adjust_link(struct net_device *ndev) | |
1116 | { | |
1117 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1118 | struct hnae_handle *h = priv->ae_handle; | |
1119 | int state = 1; | |
1120 | ||
1121 | /* If there is no phy, do not need adjust link */ | |
1122 | if (ndev->phydev) { | |
1123 | /* When phy link down, do nothing */ | |
1124 | if (ndev->phydev->link == 0) | |
1125 | return; | |
1126 | ||
1127 | if (h->dev->ops->need_adjust_link(h, ndev->phydev->speed, | |
1128 | ndev->phydev->duplex)) { | |
1129 | /* because Hi161X chip don't support to change gmac | |
1130 | * speed and duplex with traffic. Delay 200ms to | |
1131 | * make sure there is no more data in chip FIFO. | |
1132 | */ | |
1133 | netif_carrier_off(ndev); | |
1134 | msleep(200); | |
1135 | h->dev->ops->adjust_link(h, ndev->phydev->speed, | |
1136 | ndev->phydev->duplex); | |
1137 | netif_carrier_on(ndev); | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | state = state && h->dev->ops->get_status(h); | |
1142 | ||
1143 | if (state != priv->link) { | |
1144 | if (state) { | |
1145 | netif_carrier_on(ndev); | |
1146 | netif_tx_wake_all_queues(ndev); | |
1147 | netdev_info(ndev, "link up\n"); | |
1148 | } else { | |
1149 | netif_carrier_off(ndev); | |
1150 | netdev_info(ndev, "link down\n"); | |
1151 | } | |
1152 | priv->link = state; | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | /** | |
1157 | *hns_nic_init_phy - init phy | |
1158 | *@ndev: net device | |
1159 | *@h: ae handle | |
1160 | * Return 0 on success, negative on failure | |
1161 | */ | |
1162 | int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h) | |
1163 | { | |
1164 | __ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, }; | |
1165 | struct phy_device *phy_dev = h->phy_dev; | |
1166 | int ret; | |
1167 | ||
1168 | if (!h->phy_dev) | |
1169 | return 0; | |
1170 | ||
1171 | ethtool_convert_legacy_u32_to_link_mode(supported, h->if_support); | |
1172 | linkmode_and(phy_dev->supported, phy_dev->supported, supported); | |
1173 | linkmode_copy(phy_dev->advertising, phy_dev->supported); | |
1174 | ||
1175 | if (h->phy_if == PHY_INTERFACE_MODE_XGMII) | |
1176 | phy_dev->autoneg = false; | |
1177 | ||
1178 | if (h->phy_if != PHY_INTERFACE_MODE_XGMII) { | |
1179 | phy_dev->dev_flags = 0; | |
1180 | ||
1181 | ret = phy_connect_direct(ndev, phy_dev, hns_nic_adjust_link, | |
1182 | h->phy_if); | |
1183 | } else { | |
1184 | ret = phy_attach_direct(ndev, phy_dev, 0, h->phy_if); | |
1185 | } | |
1186 | if (unlikely(ret)) | |
1187 | return -ENODEV; | |
1188 | ||
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | static int hns_nic_ring_open(struct net_device *netdev, int idx) | |
1193 | { | |
1194 | struct hns_nic_priv *priv = netdev_priv(netdev); | |
1195 | struct hnae_handle *h = priv->ae_handle; | |
1196 | ||
1197 | napi_enable(&priv->ring_data[idx].napi); | |
1198 | ||
1199 | enable_irq(priv->ring_data[idx].ring->irq); | |
1200 | h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0); | |
1201 | ||
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p) | |
1206 | { | |
1207 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1208 | struct hnae_handle *h = priv->ae_handle; | |
1209 | struct sockaddr *mac_addr = p; | |
1210 | int ret; | |
1211 | ||
1212 | if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data)) | |
1213 | return -EADDRNOTAVAIL; | |
1214 | ||
1215 | ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data); | |
1216 | if (ret) { | |
1217 | netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret); | |
1218 | return ret; | |
1219 | } | |
1220 | ||
1221 | memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len); | |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | static void hns_nic_update_stats(struct net_device *netdev) | |
1227 | { | |
1228 | struct hns_nic_priv *priv = netdev_priv(netdev); | |
1229 | struct hnae_handle *h = priv->ae_handle; | |
1230 | ||
1231 | h->dev->ops->update_stats(h, &netdev->stats); | |
1232 | } | |
1233 | ||
1234 | /* set mac addr if it is configed. or leave it to the AE driver */ | |
1235 | static void hns_init_mac_addr(struct net_device *ndev) | |
1236 | { | |
1237 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1238 | ||
1239 | if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) { | |
1240 | eth_hw_addr_random(ndev); | |
1241 | dev_warn(priv->dev, "No valid mac, use random mac %pM", | |
1242 | ndev->dev_addr); | |
1243 | } | |
1244 | } | |
1245 | ||
1246 | static void hns_nic_ring_close(struct net_device *netdev, int idx) | |
1247 | { | |
1248 | struct hns_nic_priv *priv = netdev_priv(netdev); | |
1249 | struct hnae_handle *h = priv->ae_handle; | |
1250 | ||
1251 | h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1); | |
1252 | disable_irq(priv->ring_data[idx].ring->irq); | |
1253 | ||
1254 | napi_disable(&priv->ring_data[idx].napi); | |
1255 | } | |
1256 | ||
1257 | static int hns_nic_init_affinity_mask(int q_num, int ring_idx, | |
1258 | struct hnae_ring *ring, cpumask_t *mask) | |
1259 | { | |
1260 | int cpu; | |
1261 | ||
1262 | /* Diffrent irq banlance between 16core and 32core. | |
1263 | * The cpu mask set by ring index according to the ring flag | |
1264 | * which indicate the ring is tx or rx. | |
1265 | */ | |
1266 | if (q_num == num_possible_cpus()) { | |
1267 | if (is_tx_ring(ring)) | |
1268 | cpu = ring_idx; | |
1269 | else | |
1270 | cpu = ring_idx - q_num; | |
1271 | } else { | |
1272 | if (is_tx_ring(ring)) | |
1273 | cpu = ring_idx * 2; | |
1274 | else | |
1275 | cpu = (ring_idx - q_num) * 2 + 1; | |
1276 | } | |
1277 | ||
1278 | cpumask_clear(mask); | |
1279 | cpumask_set_cpu(cpu, mask); | |
1280 | ||
1281 | return cpu; | |
1282 | } | |
1283 | ||
1284 | static void hns_nic_free_irq(int q_num, struct hns_nic_priv *priv) | |
1285 | { | |
1286 | int i; | |
1287 | ||
1288 | for (i = 0; i < q_num * 2; i++) { | |
1289 | if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) { | |
1290 | irq_set_affinity_hint(priv->ring_data[i].ring->irq, | |
1291 | NULL); | |
1292 | free_irq(priv->ring_data[i].ring->irq, | |
1293 | &priv->ring_data[i]); | |
1294 | priv->ring_data[i].ring->irq_init_flag = | |
1295 | RCB_IRQ_NOT_INITED; | |
1296 | } | |
1297 | } | |
1298 | } | |
1299 | ||
1300 | static int hns_nic_init_irq(struct hns_nic_priv *priv) | |
1301 | { | |
1302 | struct hnae_handle *h = priv->ae_handle; | |
1303 | struct hns_nic_ring_data *rd; | |
1304 | int i; | |
1305 | int ret; | |
1306 | int cpu; | |
1307 | ||
1308 | for (i = 0; i < h->q_num * 2; i++) { | |
1309 | rd = &priv->ring_data[i]; | |
1310 | ||
1311 | if (rd->ring->irq_init_flag == RCB_IRQ_INITED) | |
1312 | break; | |
1313 | ||
1314 | snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN, | |
1315 | "%s-%s%d", priv->netdev->name, | |
1316 | (is_tx_ring(rd->ring) ? "tx" : "rx"), rd->queue_index); | |
1317 | ||
1318 | rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0'; | |
1319 | ||
1320 | ret = request_irq(rd->ring->irq, | |
1321 | hns_irq_handle, 0, rd->ring->ring_name, rd); | |
1322 | if (ret) { | |
1323 | netdev_err(priv->netdev, "request irq(%d) fail\n", | |
1324 | rd->ring->irq); | |
1325 | goto out_free_irq; | |
1326 | } | |
1327 | disable_irq(rd->ring->irq); | |
1328 | ||
1329 | cpu = hns_nic_init_affinity_mask(h->q_num, i, | |
1330 | rd->ring, &rd->mask); | |
1331 | ||
1332 | if (cpu_online(cpu)) | |
1333 | irq_set_affinity_hint(rd->ring->irq, | |
1334 | &rd->mask); | |
1335 | ||
1336 | rd->ring->irq_init_flag = RCB_IRQ_INITED; | |
1337 | } | |
1338 | ||
1339 | return 0; | |
1340 | ||
1341 | out_free_irq: | |
1342 | hns_nic_free_irq(h->q_num, priv); | |
1343 | return ret; | |
1344 | } | |
1345 | ||
1346 | static int hns_nic_net_up(struct net_device *ndev) | |
1347 | { | |
1348 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1349 | struct hnae_handle *h = priv->ae_handle; | |
1350 | int i, j; | |
1351 | int ret; | |
1352 | ||
1353 | if (!test_bit(NIC_STATE_DOWN, &priv->state)) | |
1354 | return 0; | |
1355 | ||
1356 | ret = hns_nic_init_irq(priv); | |
1357 | if (ret != 0) { | |
1358 | netdev_err(ndev, "hns init irq failed! ret=%d\n", ret); | |
1359 | return ret; | |
1360 | } | |
1361 | ||
1362 | for (i = 0; i < h->q_num * 2; i++) { | |
1363 | ret = hns_nic_ring_open(ndev, i); | |
1364 | if (ret) | |
1365 | goto out_has_some_queues; | |
1366 | } | |
1367 | ||
1368 | ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr); | |
1369 | if (ret) | |
1370 | goto out_set_mac_addr_err; | |
1371 | ||
1372 | ret = h->dev->ops->start ? h->dev->ops->start(h) : 0; | |
1373 | if (ret) | |
1374 | goto out_start_err; | |
1375 | ||
1376 | if (ndev->phydev) | |
1377 | phy_start(ndev->phydev); | |
1378 | ||
1379 | clear_bit(NIC_STATE_DOWN, &priv->state); | |
1380 | (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ); | |
1381 | ||
1382 | return 0; | |
1383 | ||
1384 | out_start_err: | |
1385 | netif_stop_queue(ndev); | |
1386 | out_set_mac_addr_err: | |
1387 | out_has_some_queues: | |
1388 | for (j = i - 1; j >= 0; j--) | |
1389 | hns_nic_ring_close(ndev, j); | |
1390 | ||
1391 | hns_nic_free_irq(h->q_num, priv); | |
1392 | set_bit(NIC_STATE_DOWN, &priv->state); | |
1393 | ||
1394 | return ret; | |
1395 | } | |
1396 | ||
1397 | static void hns_nic_net_down(struct net_device *ndev) | |
1398 | { | |
1399 | int i; | |
1400 | struct hnae_ae_ops *ops; | |
1401 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1402 | ||
1403 | if (test_and_set_bit(NIC_STATE_DOWN, &priv->state)) | |
1404 | return; | |
1405 | ||
1406 | (void)del_timer_sync(&priv->service_timer); | |
1407 | netif_tx_stop_all_queues(ndev); | |
1408 | netif_carrier_off(ndev); | |
1409 | netif_tx_disable(ndev); | |
1410 | priv->link = 0; | |
1411 | ||
1412 | if (ndev->phydev) | |
1413 | phy_stop(ndev->phydev); | |
1414 | ||
1415 | ops = priv->ae_handle->dev->ops; | |
1416 | ||
1417 | if (ops->stop) | |
1418 | ops->stop(priv->ae_handle); | |
1419 | ||
1420 | netif_tx_stop_all_queues(ndev); | |
1421 | ||
1422 | for (i = priv->ae_handle->q_num - 1; i >= 0; i--) { | |
1423 | hns_nic_ring_close(ndev, i); | |
1424 | hns_nic_ring_close(ndev, i + priv->ae_handle->q_num); | |
1425 | ||
1426 | /* clean tx buffers*/ | |
1427 | hns_nic_tx_clr_all_bufs(priv->ring_data + i); | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | void hns_nic_net_reset(struct net_device *ndev) | |
1432 | { | |
1433 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1434 | struct hnae_handle *handle = priv->ae_handle; | |
1435 | ||
1436 | while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state)) | |
1437 | usleep_range(1000, 2000); | |
1438 | ||
1439 | (void)hnae_reinit_handle(handle); | |
1440 | ||
1441 | clear_bit(NIC_STATE_RESETTING, &priv->state); | |
1442 | } | |
1443 | ||
1444 | void hns_nic_net_reinit(struct net_device *netdev) | |
1445 | { | |
1446 | struct hns_nic_priv *priv = netdev_priv(netdev); | |
1447 | enum hnae_port_type type = priv->ae_handle->port_type; | |
1448 | ||
1449 | netif_trans_update(priv->netdev); | |
1450 | while (test_and_set_bit(NIC_STATE_REINITING, &priv->state)) | |
1451 | usleep_range(1000, 2000); | |
1452 | ||
1453 | hns_nic_net_down(netdev); | |
1454 | ||
1455 | /* Only do hns_nic_net_reset in debug mode | |
1456 | * because of hardware limitation. | |
1457 | */ | |
1458 | if (type == HNAE_PORT_DEBUG) | |
1459 | hns_nic_net_reset(netdev); | |
1460 | ||
1461 | (void)hns_nic_net_up(netdev); | |
1462 | clear_bit(NIC_STATE_REINITING, &priv->state); | |
1463 | } | |
1464 | ||
1465 | static int hns_nic_net_open(struct net_device *ndev) | |
1466 | { | |
1467 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1468 | struct hnae_handle *h = priv->ae_handle; | |
1469 | int ret; | |
1470 | ||
1471 | if (test_bit(NIC_STATE_TESTING, &priv->state)) | |
1472 | return -EBUSY; | |
1473 | ||
1474 | priv->link = 0; | |
1475 | netif_carrier_off(ndev); | |
1476 | ||
1477 | ret = netif_set_real_num_tx_queues(ndev, h->q_num); | |
1478 | if (ret < 0) { | |
1479 | netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n", | |
1480 | ret); | |
1481 | return ret; | |
1482 | } | |
1483 | ||
1484 | ret = netif_set_real_num_rx_queues(ndev, h->q_num); | |
1485 | if (ret < 0) { | |
1486 | netdev_err(ndev, | |
1487 | "netif_set_real_num_rx_queues fail, ret=%d!\n", ret); | |
1488 | return ret; | |
1489 | } | |
1490 | ||
1491 | ret = hns_nic_net_up(ndev); | |
1492 | if (ret) { | |
1493 | netdev_err(ndev, | |
1494 | "hns net up fail, ret=%d!\n", ret); | |
1495 | return ret; | |
1496 | } | |
1497 | ||
1498 | return 0; | |
1499 | } | |
1500 | ||
1501 | static int hns_nic_net_stop(struct net_device *ndev) | |
1502 | { | |
1503 | hns_nic_net_down(ndev); | |
1504 | ||
1505 | return 0; | |
1506 | } | |
1507 | ||
1508 | static void hns_tx_timeout_reset(struct hns_nic_priv *priv); | |
1509 | #define HNS_TX_TIMEO_LIMIT (40 * HZ) | |
1510 | static void hns_nic_net_timeout(struct net_device *ndev) | |
1511 | { | |
1512 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1513 | ||
1514 | if (ndev->watchdog_timeo < HNS_TX_TIMEO_LIMIT) { | |
1515 | ndev->watchdog_timeo *= 2; | |
1516 | netdev_info(ndev, "watchdog_timo changed to %d.\n", | |
1517 | ndev->watchdog_timeo); | |
1518 | } else { | |
1519 | ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT; | |
1520 | hns_tx_timeout_reset(priv); | |
1521 | } | |
1522 | } | |
1523 | ||
1524 | static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr, | |
1525 | int cmd) | |
1526 | { | |
1527 | struct phy_device *phy_dev = netdev->phydev; | |
1528 | ||
1529 | if (!netif_running(netdev)) | |
1530 | return -EINVAL; | |
1531 | ||
1532 | if (!phy_dev) | |
1533 | return -ENOTSUPP; | |
1534 | ||
1535 | return phy_mii_ioctl(phy_dev, ifr, cmd); | |
1536 | } | |
1537 | ||
1538 | static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb, | |
1539 | struct net_device *ndev) | |
1540 | { | |
1541 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1542 | ||
1543 | assert(skb->queue_mapping < ndev->ae_handle->q_num); | |
1544 | ||
1545 | return hns_nic_net_xmit_hw(ndev, skb, | |
1546 | &tx_ring_data(priv, skb->queue_mapping)); | |
1547 | } | |
1548 | ||
1549 | static void hns_nic_drop_rx_fetch(struct hns_nic_ring_data *ring_data, | |
1550 | struct sk_buff *skb) | |
1551 | { | |
1552 | dev_kfree_skb_any(skb); | |
1553 | } | |
1554 | ||
1555 | #define HNS_LB_TX_RING 0 | |
1556 | static struct sk_buff *hns_assemble_skb(struct net_device *ndev) | |
1557 | { | |
1558 | struct sk_buff *skb; | |
1559 | struct ethhdr *ethhdr; | |
1560 | int frame_len; | |
1561 | ||
1562 | /* allocate test skb */ | |
1563 | skb = alloc_skb(64, GFP_KERNEL); | |
1564 | if (!skb) | |
1565 | return NULL; | |
1566 | ||
1567 | skb_put(skb, 64); | |
1568 | skb->dev = ndev; | |
1569 | memset(skb->data, 0xFF, skb->len); | |
1570 | ||
1571 | /* must be tcp/ip package */ | |
1572 | ethhdr = (struct ethhdr *)skb->data; | |
1573 | ethhdr->h_proto = htons(ETH_P_IP); | |
1574 | ||
1575 | frame_len = skb->len & (~1ul); | |
1576 | memset(&skb->data[frame_len / 2], 0xAA, | |
1577 | frame_len / 2 - 1); | |
1578 | ||
1579 | skb->queue_mapping = HNS_LB_TX_RING; | |
1580 | ||
1581 | return skb; | |
1582 | } | |
1583 | ||
1584 | static int hns_enable_serdes_lb(struct net_device *ndev) | |
1585 | { | |
1586 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1587 | struct hnae_handle *h = priv->ae_handle; | |
1588 | struct hnae_ae_ops *ops = h->dev->ops; | |
1589 | int speed, duplex; | |
1590 | int ret; | |
1591 | ||
1592 | ret = ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 1); | |
1593 | if (ret) | |
1594 | return ret; | |
1595 | ||
1596 | ret = ops->start ? ops->start(h) : 0; | |
1597 | if (ret) | |
1598 | return ret; | |
1599 | ||
1600 | /* link adjust duplex*/ | |
1601 | if (h->phy_if != PHY_INTERFACE_MODE_XGMII) | |
1602 | speed = 1000; | |
1603 | else | |
1604 | speed = 10000; | |
1605 | duplex = 1; | |
1606 | ||
1607 | ops->adjust_link(h, speed, duplex); | |
1608 | ||
1609 | /* wait h/w ready */ | |
1610 | mdelay(300); | |
1611 | ||
1612 | return 0; | |
1613 | } | |
1614 | ||
1615 | static void hns_disable_serdes_lb(struct net_device *ndev) | |
1616 | { | |
1617 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1618 | struct hnae_handle *h = priv->ae_handle; | |
1619 | struct hnae_ae_ops *ops = h->dev->ops; | |
1620 | ||
1621 | ops->stop(h); | |
1622 | ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 0); | |
1623 | } | |
1624 | ||
1625 | /** | |
1626 | *hns_nic_clear_all_rx_fetch - clear the chip fetched descriptions. The | |
1627 | *function as follows: | |
1628 | * 1. if one rx ring has found the page_offset is not equal 0 between head | |
1629 | * and tail, it means that the chip fetched the wrong descs for the ring | |
1630 | * which buffer size is 4096. | |
1631 | * 2. we set the chip serdes loopback and set rss indirection to the ring. | |
1632 | * 3. construct 64-bytes ip broadcast packages, wait the associated rx ring | |
1633 | * recieving all packages and it will fetch new descriptions. | |
1634 | * 4. recover to the original state. | |
1635 | * | |
1636 | *@ndev: net device | |
1637 | */ | |
1638 | static int hns_nic_clear_all_rx_fetch(struct net_device *ndev) | |
1639 | { | |
1640 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1641 | struct hnae_handle *h = priv->ae_handle; | |
1642 | struct hnae_ae_ops *ops = h->dev->ops; | |
1643 | struct hns_nic_ring_data *rd; | |
1644 | struct hnae_ring *ring; | |
1645 | struct sk_buff *skb; | |
1646 | u32 *org_indir; | |
1647 | u32 *cur_indir; | |
1648 | int indir_size; | |
1649 | int head, tail; | |
1650 | int fetch_num; | |
1651 | int i, j; | |
1652 | bool found; | |
1653 | int retry_times; | |
1654 | int ret = 0; | |
1655 | ||
1656 | /* alloc indir memory */ | |
1657 | indir_size = ops->get_rss_indir_size(h) * sizeof(*org_indir); | |
1658 | org_indir = kzalloc(indir_size, GFP_KERNEL); | |
1659 | if (!org_indir) | |
1660 | return -ENOMEM; | |
1661 | ||
1662 | /* store the orginal indirection */ | |
1663 | ops->get_rss(h, org_indir, NULL, NULL); | |
1664 | ||
1665 | cur_indir = kzalloc(indir_size, GFP_KERNEL); | |
1666 | if (!cur_indir) { | |
1667 | ret = -ENOMEM; | |
1668 | goto cur_indir_alloc_err; | |
1669 | } | |
1670 | ||
1671 | /* set loopback */ | |
1672 | if (hns_enable_serdes_lb(ndev)) { | |
1673 | ret = -EINVAL; | |
1674 | goto enable_serdes_lb_err; | |
1675 | } | |
1676 | ||
1677 | /* foreach every rx ring to clear fetch desc */ | |
1678 | for (i = 0; i < h->q_num; i++) { | |
1679 | ring = &h->qs[i]->rx_ring; | |
1680 | head = readl_relaxed(ring->io_base + RCB_REG_HEAD); | |
1681 | tail = readl_relaxed(ring->io_base + RCB_REG_TAIL); | |
1682 | found = false; | |
1683 | fetch_num = ring_dist(ring, head, tail); | |
1684 | ||
1685 | while (head != tail) { | |
1686 | if (ring->desc_cb[head].page_offset != 0) { | |
1687 | found = true; | |
1688 | break; | |
1689 | } | |
1690 | ||
1691 | head++; | |
1692 | if (head == ring->desc_num) | |
1693 | head = 0; | |
1694 | } | |
1695 | ||
1696 | if (found) { | |
1697 | for (j = 0; j < indir_size / sizeof(*org_indir); j++) | |
1698 | cur_indir[j] = i; | |
1699 | ops->set_rss(h, cur_indir, NULL, 0); | |
1700 | ||
1701 | for (j = 0; j < fetch_num; j++) { | |
1702 | /* alloc one skb and init */ | |
1703 | skb = hns_assemble_skb(ndev); | |
1704 | if (!skb) | |
1705 | goto out; | |
1706 | rd = &tx_ring_data(priv, skb->queue_mapping); | |
1707 | hns_nic_net_xmit_hw(ndev, skb, rd); | |
1708 | ||
1709 | retry_times = 0; | |
1710 | while (retry_times++ < 10) { | |
1711 | mdelay(10); | |
1712 | /* clean rx */ | |
1713 | rd = &rx_ring_data(priv, i); | |
1714 | if (rd->poll_one(rd, fetch_num, | |
1715 | hns_nic_drop_rx_fetch)) | |
1716 | break; | |
1717 | } | |
1718 | ||
1719 | retry_times = 0; | |
1720 | while (retry_times++ < 10) { | |
1721 | mdelay(10); | |
1722 | /* clean tx ring 0 send package */ | |
1723 | rd = &tx_ring_data(priv, | |
1724 | HNS_LB_TX_RING); | |
1725 | if (rd->poll_one(rd, fetch_num, NULL)) | |
1726 | break; | |
1727 | } | |
1728 | } | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | out: | |
1733 | /* restore everything */ | |
1734 | ops->set_rss(h, org_indir, NULL, 0); | |
1735 | hns_disable_serdes_lb(ndev); | |
1736 | enable_serdes_lb_err: | |
1737 | kfree(cur_indir); | |
1738 | cur_indir_alloc_err: | |
1739 | kfree(org_indir); | |
1740 | ||
1741 | return ret; | |
1742 | } | |
1743 | ||
1744 | static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu) | |
1745 | { | |
1746 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1747 | struct hnae_handle *h = priv->ae_handle; | |
1748 | bool if_running = netif_running(ndev); | |
1749 | int ret; | |
1750 | ||
1751 | /* MTU < 68 is an error and causes problems on some kernels */ | |
1752 | if (new_mtu < 68) | |
1753 | return -EINVAL; | |
1754 | ||
1755 | /* MTU no change */ | |
1756 | if (new_mtu == ndev->mtu) | |
1757 | return 0; | |
1758 | ||
1759 | if (!h->dev->ops->set_mtu) | |
1760 | return -ENOTSUPP; | |
1761 | ||
1762 | if (if_running) { | |
1763 | (void)hns_nic_net_stop(ndev); | |
1764 | msleep(100); | |
1765 | } | |
1766 | ||
1767 | if (priv->enet_ver != AE_VERSION_1 && | |
1768 | ndev->mtu <= BD_SIZE_2048_MAX_MTU && | |
1769 | new_mtu > BD_SIZE_2048_MAX_MTU) { | |
1770 | /* update desc */ | |
1771 | hnae_reinit_all_ring_desc(h); | |
1772 | ||
1773 | /* clear the package which the chip has fetched */ | |
1774 | ret = hns_nic_clear_all_rx_fetch(ndev); | |
1775 | ||
1776 | /* the page offset must be consist with desc */ | |
1777 | hnae_reinit_all_ring_page_off(h); | |
1778 | ||
1779 | if (ret) { | |
1780 | netdev_err(ndev, "clear the fetched desc fail\n"); | |
1781 | goto out; | |
1782 | } | |
1783 | } | |
1784 | ||
1785 | ret = h->dev->ops->set_mtu(h, new_mtu); | |
1786 | if (ret) { | |
1787 | netdev_err(ndev, "set mtu fail, return value %d\n", | |
1788 | ret); | |
1789 | goto out; | |
1790 | } | |
1791 | ||
1792 | /* finally, set new mtu to netdevice */ | |
1793 | ndev->mtu = new_mtu; | |
1794 | ||
1795 | out: | |
1796 | if (if_running) { | |
1797 | if (hns_nic_net_open(ndev)) { | |
1798 | netdev_err(ndev, "hns net open fail\n"); | |
1799 | ret = -EINVAL; | |
1800 | } | |
1801 | } | |
1802 | ||
1803 | return ret; | |
1804 | } | |
1805 | ||
1806 | static int hns_nic_set_features(struct net_device *netdev, | |
1807 | netdev_features_t features) | |
1808 | { | |
1809 | struct hns_nic_priv *priv = netdev_priv(netdev); | |
1810 | ||
1811 | switch (priv->enet_ver) { | |
1812 | case AE_VERSION_1: | |
1813 | if (features & (NETIF_F_TSO | NETIF_F_TSO6)) | |
1814 | netdev_info(netdev, "enet v1 do not support tso!\n"); | |
1815 | break; | |
1816 | default: | |
1817 | if (features & (NETIF_F_TSO | NETIF_F_TSO6)) { | |
1818 | priv->ops.fill_desc = fill_tso_desc; | |
1819 | priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso; | |
1820 | /* The chip only support 7*4096 */ | |
1821 | netif_set_gso_max_size(netdev, 7 * 4096); | |
1822 | } else { | |
1823 | priv->ops.fill_desc = fill_v2_desc; | |
1824 | priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx; | |
1825 | } | |
1826 | break; | |
1827 | } | |
1828 | netdev->features = features; | |
1829 | return 0; | |
1830 | } | |
1831 | ||
1832 | static netdev_features_t hns_nic_fix_features( | |
1833 | struct net_device *netdev, netdev_features_t features) | |
1834 | { | |
1835 | struct hns_nic_priv *priv = netdev_priv(netdev); | |
1836 | ||
1837 | switch (priv->enet_ver) { | |
1838 | case AE_VERSION_1: | |
1839 | features &= ~(NETIF_F_TSO | NETIF_F_TSO6 | | |
1840 | NETIF_F_HW_VLAN_CTAG_FILTER); | |
1841 | break; | |
1842 | default: | |
1843 | break; | |
1844 | } | |
1845 | return features; | |
1846 | } | |
1847 | ||
1848 | static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr) | |
1849 | { | |
1850 | struct hns_nic_priv *priv = netdev_priv(netdev); | |
1851 | struct hnae_handle *h = priv->ae_handle; | |
1852 | ||
1853 | if (h->dev->ops->add_uc_addr) | |
1854 | return h->dev->ops->add_uc_addr(h, addr); | |
1855 | ||
1856 | return 0; | |
1857 | } | |
1858 | ||
1859 | static int hns_nic_uc_unsync(struct net_device *netdev, | |
1860 | const unsigned char *addr) | |
1861 | { | |
1862 | struct hns_nic_priv *priv = netdev_priv(netdev); | |
1863 | struct hnae_handle *h = priv->ae_handle; | |
1864 | ||
1865 | if (h->dev->ops->rm_uc_addr) | |
1866 | return h->dev->ops->rm_uc_addr(h, addr); | |
1867 | ||
1868 | return 0; | |
1869 | } | |
1870 | ||
1871 | /** | |
1872 | * nic_set_multicast_list - set mutl mac address | |
1873 | * @netdev: net device | |
1874 | * @p: mac address | |
1875 | * | |
1876 | * return void | |
1877 | */ | |
1878 | static void hns_set_multicast_list(struct net_device *ndev) | |
1879 | { | |
1880 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1881 | struct hnae_handle *h = priv->ae_handle; | |
1882 | struct netdev_hw_addr *ha = NULL; | |
1883 | ||
1884 | if (!h) { | |
1885 | netdev_err(ndev, "hnae handle is null\n"); | |
1886 | return; | |
1887 | } | |
1888 | ||
1889 | if (h->dev->ops->clr_mc_addr) | |
1890 | if (h->dev->ops->clr_mc_addr(h)) | |
1891 | netdev_err(ndev, "clear multicast address fail\n"); | |
1892 | ||
1893 | if (h->dev->ops->set_mc_addr) { | |
1894 | netdev_for_each_mc_addr(ha, ndev) | |
1895 | if (h->dev->ops->set_mc_addr(h, ha->addr)) | |
1896 | netdev_err(ndev, "set multicast fail\n"); | |
1897 | } | |
1898 | } | |
1899 | ||
1900 | static void hns_nic_set_rx_mode(struct net_device *ndev) | |
1901 | { | |
1902 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1903 | struct hnae_handle *h = priv->ae_handle; | |
1904 | ||
1905 | if (h->dev->ops->set_promisc_mode) { | |
1906 | if (ndev->flags & IFF_PROMISC) | |
1907 | h->dev->ops->set_promisc_mode(h, 1); | |
1908 | else | |
1909 | h->dev->ops->set_promisc_mode(h, 0); | |
1910 | } | |
1911 | ||
1912 | hns_set_multicast_list(ndev); | |
1913 | ||
1914 | if (__dev_uc_sync(ndev, hns_nic_uc_sync, hns_nic_uc_unsync)) | |
1915 | netdev_err(ndev, "sync uc address fail\n"); | |
1916 | } | |
1917 | ||
1918 | static void hns_nic_get_stats64(struct net_device *ndev, | |
1919 | struct rtnl_link_stats64 *stats) | |
1920 | { | |
1921 | int idx = 0; | |
1922 | u64 tx_bytes = 0; | |
1923 | u64 rx_bytes = 0; | |
1924 | u64 tx_pkts = 0; | |
1925 | u64 rx_pkts = 0; | |
1926 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1927 | struct hnae_handle *h = priv->ae_handle; | |
1928 | ||
1929 | for (idx = 0; idx < h->q_num; idx++) { | |
1930 | tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes; | |
1931 | tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts; | |
1932 | rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes; | |
1933 | rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts; | |
1934 | } | |
1935 | ||
1936 | stats->tx_bytes = tx_bytes; | |
1937 | stats->tx_packets = tx_pkts; | |
1938 | stats->rx_bytes = rx_bytes; | |
1939 | stats->rx_packets = rx_pkts; | |
1940 | ||
1941 | stats->rx_errors = ndev->stats.rx_errors; | |
1942 | stats->multicast = ndev->stats.multicast; | |
1943 | stats->rx_length_errors = ndev->stats.rx_length_errors; | |
1944 | stats->rx_crc_errors = ndev->stats.rx_crc_errors; | |
1945 | stats->rx_missed_errors = ndev->stats.rx_missed_errors; | |
1946 | ||
1947 | stats->tx_errors = ndev->stats.tx_errors; | |
1948 | stats->rx_dropped = ndev->stats.rx_dropped; | |
1949 | stats->tx_dropped = ndev->stats.tx_dropped; | |
1950 | stats->collisions = ndev->stats.collisions; | |
1951 | stats->rx_over_errors = ndev->stats.rx_over_errors; | |
1952 | stats->rx_frame_errors = ndev->stats.rx_frame_errors; | |
1953 | stats->rx_fifo_errors = ndev->stats.rx_fifo_errors; | |
1954 | stats->tx_aborted_errors = ndev->stats.tx_aborted_errors; | |
1955 | stats->tx_carrier_errors = ndev->stats.tx_carrier_errors; | |
1956 | stats->tx_fifo_errors = ndev->stats.tx_fifo_errors; | |
1957 | stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors; | |
1958 | stats->tx_window_errors = ndev->stats.tx_window_errors; | |
1959 | stats->rx_compressed = ndev->stats.rx_compressed; | |
1960 | stats->tx_compressed = ndev->stats.tx_compressed; | |
1961 | } | |
1962 | ||
1963 | static u16 | |
1964 | hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb, | |
1965 | struct net_device *sb_dev, | |
1966 | select_queue_fallback_t fallback) | |
1967 | { | |
1968 | struct ethhdr *eth_hdr = (struct ethhdr *)skb->data; | |
1969 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
1970 | ||
1971 | /* fix hardware broadcast/multicast packets queue loopback */ | |
1972 | if (!AE_IS_VER1(priv->enet_ver) && | |
1973 | is_multicast_ether_addr(eth_hdr->h_dest)) | |
1974 | return 0; | |
1975 | else | |
1976 | return fallback(ndev, skb, NULL); | |
1977 | } | |
1978 | ||
1979 | static const struct net_device_ops hns_nic_netdev_ops = { | |
1980 | .ndo_open = hns_nic_net_open, | |
1981 | .ndo_stop = hns_nic_net_stop, | |
1982 | .ndo_start_xmit = hns_nic_net_xmit, | |
1983 | .ndo_tx_timeout = hns_nic_net_timeout, | |
1984 | .ndo_set_mac_address = hns_nic_net_set_mac_address, | |
1985 | .ndo_change_mtu = hns_nic_change_mtu, | |
1986 | .ndo_do_ioctl = hns_nic_do_ioctl, | |
1987 | .ndo_set_features = hns_nic_set_features, | |
1988 | .ndo_fix_features = hns_nic_fix_features, | |
1989 | .ndo_get_stats64 = hns_nic_get_stats64, | |
1990 | .ndo_set_rx_mode = hns_nic_set_rx_mode, | |
1991 | .ndo_select_queue = hns_nic_select_queue, | |
1992 | }; | |
1993 | ||
1994 | static void hns_nic_update_link_status(struct net_device *netdev) | |
1995 | { | |
1996 | struct hns_nic_priv *priv = netdev_priv(netdev); | |
1997 | ||
1998 | struct hnae_handle *h = priv->ae_handle; | |
1999 | ||
2000 | if (h->phy_dev) { | |
2001 | if (h->phy_if != PHY_INTERFACE_MODE_XGMII) | |
2002 | return; | |
2003 | ||
2004 | (void)genphy_read_status(h->phy_dev); | |
2005 | } | |
2006 | hns_nic_adjust_link(netdev); | |
2007 | } | |
2008 | ||
2009 | /* for dumping key regs*/ | |
2010 | static void hns_nic_dump(struct hns_nic_priv *priv) | |
2011 | { | |
2012 | struct hnae_handle *h = priv->ae_handle; | |
2013 | struct hnae_ae_ops *ops = h->dev->ops; | |
2014 | u32 *data, reg_num, i; | |
2015 | ||
2016 | if (ops->get_regs_len && ops->get_regs) { | |
2017 | reg_num = ops->get_regs_len(priv->ae_handle); | |
2018 | reg_num = (reg_num + 3ul) & ~3ul; | |
2019 | data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL); | |
2020 | if (data) { | |
2021 | ops->get_regs(priv->ae_handle, data); | |
2022 | for (i = 0; i < reg_num; i += 4) | |
2023 | pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n", | |
2024 | i, data[i], data[i + 1], | |
2025 | data[i + 2], data[i + 3]); | |
2026 | kfree(data); | |
2027 | } | |
2028 | } | |
2029 | ||
2030 | for (i = 0; i < h->q_num; i++) { | |
2031 | pr_info("tx_queue%d_next_to_clean:%d\n", | |
2032 | i, h->qs[i]->tx_ring.next_to_clean); | |
2033 | pr_info("tx_queue%d_next_to_use:%d\n", | |
2034 | i, h->qs[i]->tx_ring.next_to_use); | |
2035 | pr_info("rx_queue%d_next_to_clean:%d\n", | |
2036 | i, h->qs[i]->rx_ring.next_to_clean); | |
2037 | pr_info("rx_queue%d_next_to_use:%d\n", | |
2038 | i, h->qs[i]->rx_ring.next_to_use); | |
2039 | } | |
2040 | } | |
2041 | ||
2042 | /* for resetting subtask */ | |
2043 | static void hns_nic_reset_subtask(struct hns_nic_priv *priv) | |
2044 | { | |
2045 | enum hnae_port_type type = priv->ae_handle->port_type; | |
2046 | ||
2047 | if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state)) | |
2048 | return; | |
2049 | clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state); | |
2050 | ||
2051 | /* If we're already down, removing or resetting, just bail */ | |
2052 | if (test_bit(NIC_STATE_DOWN, &priv->state) || | |
2053 | test_bit(NIC_STATE_REMOVING, &priv->state) || | |
2054 | test_bit(NIC_STATE_RESETTING, &priv->state)) | |
2055 | return; | |
2056 | ||
2057 | hns_nic_dump(priv); | |
2058 | netdev_info(priv->netdev, "try to reset %s port!\n", | |
2059 | (type == HNAE_PORT_DEBUG ? "debug" : "service")); | |
2060 | ||
2061 | rtnl_lock(); | |
2062 | /* put off any impending NetWatchDogTimeout */ | |
2063 | netif_trans_update(priv->netdev); | |
2064 | hns_nic_net_reinit(priv->netdev); | |
2065 | ||
2066 | rtnl_unlock(); | |
2067 | } | |
2068 | ||
2069 | /* for doing service complete*/ | |
2070 | static void hns_nic_service_event_complete(struct hns_nic_priv *priv) | |
2071 | { | |
2072 | WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state)); | |
2073 | /* make sure to commit the things */ | |
2074 | smp_mb__before_atomic(); | |
2075 | clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state); | |
2076 | } | |
2077 | ||
2078 | static void hns_nic_service_task(struct work_struct *work) | |
2079 | { | |
2080 | struct hns_nic_priv *priv | |
2081 | = container_of(work, struct hns_nic_priv, service_task); | |
2082 | struct hnae_handle *h = priv->ae_handle; | |
2083 | ||
2084 | hns_nic_reset_subtask(priv); | |
2085 | hns_nic_update_link_status(priv->netdev); | |
2086 | h->dev->ops->update_led_status(h); | |
2087 | hns_nic_update_stats(priv->netdev); | |
2088 | ||
2089 | hns_nic_service_event_complete(priv); | |
2090 | } | |
2091 | ||
2092 | static void hns_nic_task_schedule(struct hns_nic_priv *priv) | |
2093 | { | |
2094 | if (!test_bit(NIC_STATE_DOWN, &priv->state) && | |
2095 | !test_bit(NIC_STATE_REMOVING, &priv->state) && | |
2096 | !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state)) | |
2097 | (void)schedule_work(&priv->service_task); | |
2098 | } | |
2099 | ||
2100 | static void hns_nic_service_timer(struct timer_list *t) | |
2101 | { | |
2102 | struct hns_nic_priv *priv = from_timer(priv, t, service_timer); | |
2103 | ||
2104 | (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ); | |
2105 | ||
2106 | hns_nic_task_schedule(priv); | |
2107 | } | |
2108 | ||
2109 | /** | |
2110 | * hns_tx_timeout_reset - initiate reset due to Tx timeout | |
2111 | * @priv: driver private struct | |
2112 | **/ | |
2113 | static void hns_tx_timeout_reset(struct hns_nic_priv *priv) | |
2114 | { | |
2115 | /* Do the reset outside of interrupt context */ | |
2116 | if (!test_bit(NIC_STATE_DOWN, &priv->state)) { | |
2117 | set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state); | |
2118 | netdev_warn(priv->netdev, | |
2119 | "initiating reset due to tx timeout(%llu,0x%lx)\n", | |
2120 | priv->tx_timeout_count, priv->state); | |
2121 | priv->tx_timeout_count++; | |
2122 | hns_nic_task_schedule(priv); | |
2123 | } | |
2124 | } | |
2125 | ||
2126 | static int hns_nic_init_ring_data(struct hns_nic_priv *priv) | |
2127 | { | |
2128 | struct hnae_handle *h = priv->ae_handle; | |
2129 | struct hns_nic_ring_data *rd; | |
2130 | bool is_ver1 = AE_IS_VER1(priv->enet_ver); | |
2131 | int i; | |
2132 | ||
2133 | if (h->q_num > NIC_MAX_Q_PER_VF) { | |
2134 | netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num); | |
2135 | return -EINVAL; | |
2136 | } | |
2137 | ||
2138 | priv->ring_data = kzalloc(array3_size(h->q_num, | |
2139 | sizeof(*priv->ring_data), 2), | |
2140 | GFP_KERNEL); | |
2141 | if (!priv->ring_data) | |
2142 | return -ENOMEM; | |
2143 | ||
2144 | for (i = 0; i < h->q_num; i++) { | |
2145 | rd = &priv->ring_data[i]; | |
2146 | rd->queue_index = i; | |
2147 | rd->ring = &h->qs[i]->tx_ring; | |
2148 | rd->poll_one = hns_nic_tx_poll_one; | |
2149 | rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro : | |
2150 | hns_nic_tx_fini_pro_v2; | |
2151 | ||
2152 | netif_napi_add(priv->netdev, &rd->napi, | |
2153 | hns_nic_common_poll, NAPI_POLL_WEIGHT); | |
2154 | rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED; | |
2155 | } | |
2156 | for (i = h->q_num; i < h->q_num * 2; i++) { | |
2157 | rd = &priv->ring_data[i]; | |
2158 | rd->queue_index = i - h->q_num; | |
2159 | rd->ring = &h->qs[i - h->q_num]->rx_ring; | |
2160 | rd->poll_one = hns_nic_rx_poll_one; | |
2161 | rd->ex_process = hns_nic_rx_up_pro; | |
2162 | rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro : | |
2163 | hns_nic_rx_fini_pro_v2; | |
2164 | ||
2165 | netif_napi_add(priv->netdev, &rd->napi, | |
2166 | hns_nic_common_poll, NAPI_POLL_WEIGHT); | |
2167 | rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED; | |
2168 | } | |
2169 | ||
2170 | return 0; | |
2171 | } | |
2172 | ||
2173 | static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv) | |
2174 | { | |
2175 | struct hnae_handle *h = priv->ae_handle; | |
2176 | int i; | |
2177 | ||
2178 | for (i = 0; i < h->q_num * 2; i++) { | |
2179 | netif_napi_del(&priv->ring_data[i].napi); | |
2180 | if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) { | |
2181 | (void)irq_set_affinity_hint( | |
2182 | priv->ring_data[i].ring->irq, | |
2183 | NULL); | |
2184 | free_irq(priv->ring_data[i].ring->irq, | |
2185 | &priv->ring_data[i]); | |
2186 | } | |
2187 | ||
2188 | priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED; | |
2189 | } | |
2190 | kfree(priv->ring_data); | |
2191 | } | |
2192 | ||
2193 | static void hns_nic_set_priv_ops(struct net_device *netdev) | |
2194 | { | |
2195 | struct hns_nic_priv *priv = netdev_priv(netdev); | |
2196 | struct hnae_handle *h = priv->ae_handle; | |
2197 | ||
2198 | if (AE_IS_VER1(priv->enet_ver)) { | |
2199 | priv->ops.fill_desc = fill_desc; | |
2200 | priv->ops.get_rxd_bnum = get_rx_desc_bnum; | |
2201 | priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx; | |
2202 | } else { | |
2203 | priv->ops.get_rxd_bnum = get_v2rx_desc_bnum; | |
2204 | if ((netdev->features & NETIF_F_TSO) || | |
2205 | (netdev->features & NETIF_F_TSO6)) { | |
2206 | priv->ops.fill_desc = fill_tso_desc; | |
2207 | priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso; | |
2208 | /* This chip only support 7*4096 */ | |
2209 | netif_set_gso_max_size(netdev, 7 * 4096); | |
2210 | } else { | |
2211 | priv->ops.fill_desc = fill_v2_desc; | |
2212 | priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx; | |
2213 | } | |
2214 | /* enable tso when init | |
2215 | * control tso on/off through TSE bit in bd | |
2216 | */ | |
2217 | h->dev->ops->set_tso_stats(h, 1); | |
2218 | } | |
2219 | } | |
2220 | ||
2221 | static int hns_nic_try_get_ae(struct net_device *ndev) | |
2222 | { | |
2223 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
2224 | struct hnae_handle *h; | |
2225 | int ret; | |
2226 | ||
2227 | h = hnae_get_handle(&priv->netdev->dev, | |
2228 | priv->fwnode, priv->port_id, NULL); | |
2229 | if (IS_ERR_OR_NULL(h)) { | |
2230 | ret = -ENODEV; | |
2231 | dev_dbg(priv->dev, "has not handle, register notifier!\n"); | |
2232 | goto out; | |
2233 | } | |
2234 | priv->ae_handle = h; | |
2235 | ||
2236 | ret = hns_nic_init_phy(ndev, h); | |
2237 | if (ret) { | |
2238 | dev_err(priv->dev, "probe phy device fail!\n"); | |
2239 | goto out_init_phy; | |
2240 | } | |
2241 | ||
2242 | ret = hns_nic_init_ring_data(priv); | |
2243 | if (ret) { | |
2244 | ret = -ENOMEM; | |
2245 | goto out_init_ring_data; | |
2246 | } | |
2247 | ||
2248 | hns_nic_set_priv_ops(ndev); | |
2249 | ||
2250 | ret = register_netdev(ndev); | |
2251 | if (ret) { | |
2252 | dev_err(priv->dev, "probe register netdev fail!\n"); | |
2253 | goto out_reg_ndev_fail; | |
2254 | } | |
2255 | return 0; | |
2256 | ||
2257 | out_reg_ndev_fail: | |
2258 | hns_nic_uninit_ring_data(priv); | |
2259 | priv->ring_data = NULL; | |
2260 | out_init_phy: | |
2261 | out_init_ring_data: | |
2262 | hnae_put_handle(priv->ae_handle); | |
2263 | priv->ae_handle = NULL; | |
2264 | out: | |
2265 | return ret; | |
2266 | } | |
2267 | ||
2268 | static int hns_nic_notifier_action(struct notifier_block *nb, | |
2269 | unsigned long action, void *data) | |
2270 | { | |
2271 | struct hns_nic_priv *priv = | |
2272 | container_of(nb, struct hns_nic_priv, notifier_block); | |
2273 | ||
2274 | assert(action == HNAE_AE_REGISTER); | |
2275 | ||
2276 | if (!hns_nic_try_get_ae(priv->netdev)) { | |
2277 | hnae_unregister_notifier(&priv->notifier_block); | |
2278 | priv->notifier_block.notifier_call = NULL; | |
2279 | } | |
2280 | return 0; | |
2281 | } | |
2282 | ||
2283 | static int hns_nic_dev_probe(struct platform_device *pdev) | |
2284 | { | |
2285 | struct device *dev = &pdev->dev; | |
2286 | struct net_device *ndev; | |
2287 | struct hns_nic_priv *priv; | |
2288 | u32 port_id; | |
2289 | int ret; | |
2290 | ||
2291 | ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF); | |
2292 | if (!ndev) | |
2293 | return -ENOMEM; | |
2294 | ||
2295 | platform_set_drvdata(pdev, ndev); | |
2296 | ||
2297 | priv = netdev_priv(ndev); | |
2298 | priv->dev = dev; | |
2299 | priv->netdev = ndev; | |
2300 | ||
2301 | if (dev_of_node(dev)) { | |
2302 | struct device_node *ae_node; | |
2303 | ||
2304 | if (of_device_is_compatible(dev->of_node, | |
2305 | "hisilicon,hns-nic-v1")) | |
2306 | priv->enet_ver = AE_VERSION_1; | |
2307 | else | |
2308 | priv->enet_ver = AE_VERSION_2; | |
2309 | ||
2310 | ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0); | |
2311 | if (!ae_node) { | |
2312 | ret = -ENODEV; | |
2313 | dev_err(dev, "not find ae-handle\n"); | |
2314 | goto out_read_prop_fail; | |
2315 | } | |
2316 | priv->fwnode = &ae_node->fwnode; | |
2317 | } else if (is_acpi_node(dev->fwnode)) { | |
2318 | struct fwnode_reference_args args; | |
2319 | ||
2320 | if (acpi_dev_found(hns_enet_acpi_match[0].id)) | |
2321 | priv->enet_ver = AE_VERSION_1; | |
2322 | else if (acpi_dev_found(hns_enet_acpi_match[1].id)) | |
2323 | priv->enet_ver = AE_VERSION_2; | |
2324 | else | |
2325 | return -ENXIO; | |
2326 | ||
2327 | /* try to find port-idx-in-ae first */ | |
2328 | ret = acpi_node_get_property_reference(dev->fwnode, | |
2329 | "ae-handle", 0, &args); | |
2330 | if (ret) { | |
2331 | dev_err(dev, "not find ae-handle\n"); | |
2332 | goto out_read_prop_fail; | |
2333 | } | |
2334 | if (!is_acpi_device_node(args.fwnode)) { | |
2335 | ret = -EINVAL; | |
2336 | goto out_read_prop_fail; | |
2337 | } | |
2338 | priv->fwnode = args.fwnode; | |
2339 | } else { | |
2340 | dev_err(dev, "cannot read cfg data from OF or acpi\n"); | |
2341 | return -ENXIO; | |
2342 | } | |
2343 | ||
2344 | ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id); | |
2345 | if (ret) { | |
2346 | /* only for old code compatible */ | |
2347 | ret = device_property_read_u32(dev, "port-id", &port_id); | |
2348 | if (ret) | |
2349 | goto out_read_prop_fail; | |
2350 | /* for old dts, we need to caculate the port offset */ | |
2351 | port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET | |
2352 | : port_id - HNS_SRV_OFFSET; | |
2353 | } | |
2354 | priv->port_id = port_id; | |
2355 | ||
2356 | hns_init_mac_addr(ndev); | |
2357 | ||
2358 | ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT; | |
2359 | ndev->priv_flags |= IFF_UNICAST_FLT; | |
2360 | ndev->netdev_ops = &hns_nic_netdev_ops; | |
2361 | hns_ethtool_set_ops(ndev); | |
2362 | ||
2363 | ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | | |
2364 | NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO | | |
2365 | NETIF_F_GRO; | |
2366 | ndev->vlan_features |= | |
2367 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM; | |
2368 | ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; | |
2369 | ||
2370 | /* MTU range: 68 - 9578 (v1) or 9706 (v2) */ | |
2371 | ndev->min_mtu = MAC_MIN_MTU; | |
2372 | switch (priv->enet_ver) { | |
2373 | case AE_VERSION_2: | |
2374 | ndev->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_NTUPLE; | |
2375 | ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | | |
2376 | NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO | | |
2377 | NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6; | |
2378 | ndev->max_mtu = MAC_MAX_MTU_V2 - | |
2379 | (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); | |
2380 | break; | |
2381 | default: | |
2382 | ndev->max_mtu = MAC_MAX_MTU - | |
2383 | (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); | |
2384 | break; | |
2385 | } | |
2386 | ||
2387 | SET_NETDEV_DEV(ndev, dev); | |
2388 | ||
2389 | if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64))) | |
2390 | dev_dbg(dev, "set mask to 64bit\n"); | |
2391 | else | |
2392 | dev_err(dev, "set mask to 64bit fail!\n"); | |
2393 | ||
2394 | /* carrier off reporting is important to ethtool even BEFORE open */ | |
2395 | netif_carrier_off(ndev); | |
2396 | ||
2397 | timer_setup(&priv->service_timer, hns_nic_service_timer, 0); | |
2398 | INIT_WORK(&priv->service_task, hns_nic_service_task); | |
2399 | ||
2400 | set_bit(NIC_STATE_SERVICE_INITED, &priv->state); | |
2401 | clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state); | |
2402 | set_bit(NIC_STATE_DOWN, &priv->state); | |
2403 | ||
2404 | if (hns_nic_try_get_ae(priv->netdev)) { | |
2405 | priv->notifier_block.notifier_call = hns_nic_notifier_action; | |
2406 | ret = hnae_register_notifier(&priv->notifier_block); | |
2407 | if (ret) { | |
2408 | dev_err(dev, "register notifier fail!\n"); | |
2409 | goto out_notify_fail; | |
2410 | } | |
2411 | dev_dbg(dev, "has not handle, register notifier!\n"); | |
2412 | } | |
2413 | ||
2414 | return 0; | |
2415 | ||
2416 | out_notify_fail: | |
2417 | (void)cancel_work_sync(&priv->service_task); | |
2418 | out_read_prop_fail: | |
2419 | /* safe for ACPI FW */ | |
2420 | of_node_put(to_of_node(priv->fwnode)); | |
2421 | free_netdev(ndev); | |
2422 | return ret; | |
2423 | } | |
2424 | ||
2425 | static int hns_nic_dev_remove(struct platform_device *pdev) | |
2426 | { | |
2427 | struct net_device *ndev = platform_get_drvdata(pdev); | |
2428 | struct hns_nic_priv *priv = netdev_priv(ndev); | |
2429 | ||
2430 | if (ndev->reg_state != NETREG_UNINITIALIZED) | |
2431 | unregister_netdev(ndev); | |
2432 | ||
2433 | if (priv->ring_data) | |
2434 | hns_nic_uninit_ring_data(priv); | |
2435 | priv->ring_data = NULL; | |
2436 | ||
2437 | if (ndev->phydev) | |
2438 | phy_disconnect(ndev->phydev); | |
2439 | ||
2440 | if (!IS_ERR_OR_NULL(priv->ae_handle)) | |
2441 | hnae_put_handle(priv->ae_handle); | |
2442 | priv->ae_handle = NULL; | |
2443 | if (priv->notifier_block.notifier_call) | |
2444 | hnae_unregister_notifier(&priv->notifier_block); | |
2445 | priv->notifier_block.notifier_call = NULL; | |
2446 | ||
2447 | set_bit(NIC_STATE_REMOVING, &priv->state); | |
2448 | (void)cancel_work_sync(&priv->service_task); | |
2449 | ||
2450 | /* safe for ACPI FW */ | |
2451 | of_node_put(to_of_node(priv->fwnode)); | |
2452 | ||
2453 | free_netdev(ndev); | |
2454 | return 0; | |
2455 | } | |
2456 | ||
2457 | static const struct of_device_id hns_enet_of_match[] = { | |
2458 | {.compatible = "hisilicon,hns-nic-v1",}, | |
2459 | {.compatible = "hisilicon,hns-nic-v2",}, | |
2460 | {}, | |
2461 | }; | |
2462 | ||
2463 | MODULE_DEVICE_TABLE(of, hns_enet_of_match); | |
2464 | ||
2465 | static struct platform_driver hns_nic_dev_driver = { | |
2466 | .driver = { | |
2467 | .name = "hns-nic", | |
2468 | .of_match_table = hns_enet_of_match, | |
2469 | .acpi_match_table = ACPI_PTR(hns_enet_acpi_match), | |
2470 | }, | |
2471 | .probe = hns_nic_dev_probe, | |
2472 | .remove = hns_nic_dev_remove, | |
2473 | }; | |
2474 | ||
2475 | module_platform_driver(hns_nic_dev_driver); | |
2476 | ||
2477 | MODULE_DESCRIPTION("HISILICON HNS Ethernet driver"); | |
2478 | MODULE_AUTHOR("Hisilicon, Inc."); | |
2479 | MODULE_LICENSE("GPL"); | |
2480 | MODULE_ALIAS("platform:hns-nic"); |